Physics Questions and Answers September 13, 2022

The value of emitter current in the given circuit is (Round off to 1 decimal places) 2 LAMA B 0.37 34 Vc 10V CC 100 E 2 CE .

The Zener current I for the given circuit is VR www R 10k Vin 40 V Vz 20 V Iz mA. R 20 KQ L

The decimal equivalent of the binary number 110.101 is

When an object is placed farther from a convex mirror than thefocal length, the image is: A)smaller and real B)larger and virtual C)larger and real D)smaller and inverted E)smaller and virtual

Vector Concepts Determine if the following statements are true or false. The magnitude of a vector can be different in different coordinate systems. It is possible to add a scalar to a vector. A 2D vector can have a magnitude equal to zero even when one of its components it nonzero. The direction of a vector can be different in different

A Evaluate the dot product A Bif A22 and B719j. B Evaluate the dot product A Bif A2i7j and B9i2j.

Flux out of a Cube A point charge of magnitude q is at the center of a cube with sides of length L. Part A What is the electric flux through each of the six faces of the cube Use 0 for the permittivity of free space. Submit 1 Submit Hints My Answers Give Up Review Part Part B What would be the flux 1 through a face of the cube if its sides

7. Which one of the following expressions determines the critical angle for quartz (n 1.5) immersed in oil (n1.1) A) 0 1.51.1 B) sin(1.11.5) C) sin (1.11.5) D) 8,tan (1.11.5)

1. Sketch qualitatively the electric field lines and equipotential lines for a system of two equal positive point charges and two equal negative point charges. Is it possible for two equipotential lines to cross Explain. 2. 3. Why are the equipotential lines near conductor surfaces parallel to the surface 27,Mapping of Electric Field. 4. Sketch

find the threrold energy of a following seachilon p b

A neutral pion whose K.E. is equal to its aest mass energy decays in flight. Find the angle byw 2 Tsay photons that are produced if their energies are some Y TT Princ Pycoso 20

Calculate the energy momentum velocity of T. M (T) M M(x) mx

An atom of mass M. can be excited to a state. of mass MA by photon capture. The free. of photon which can cause these transition y (a) ACtah (b) 40 h (C) 46 2mh (4) 4 (4 2m) 2 zmh

A particle of mass I initially at rest decays into 2 pices each of mass m. What is the speed of each piece as if flice off

In 1956, An experiment was performed at Workley to search for the antiproton which could be produced in the reen pppppp. what is the thresold energy of the seen,

Calculate the thresold KIE. t to produce from the seer pb 1 pt b IImeson

Compute the energies of proton II mesons that result from the decay of 1. k I

it Calculate the thresold kinetic energy for the reaction p H 7H H a) of protons are incident on 3H at jest. be of it le tritons are incident on proton.

8a for the charge density p(x) p. e the R.M.S. rading of the nucleus is a 12. Arg. value of sequere of sodin j.e.. show that

Assuming that the nuclear rading is given by. R R A 3 find the no... of neutron density.

A particle of unit mass is released at x 1 in onedimensional patential U(x)xx. which one of the following statement is incorrect. La) Particle will come to rest at x 0 () Particles speed is max at x e) speed of particle at x 1 is 3 (d) Particle will not return to x 1

A black of mass 4kg is attached to a spring offer spring constant 100 Nm. One end of spring is attached to the roof. Initially the black is at rest. When released maximum speed attained by the block is

body sliding on a smalth inclined plane requires 4 sec. to reach bottom after starting from rest at the top. How much time does it take to cover one fourth the distance starting from rest at the top

A particle of mass m is placed on an inclined plane making an adjustable angle with horizontal as shown in figure. The coefficient of friction bw the particle and the inclined plane is . If the inclined plane is moving horizontally with a uniform acceleration a (see figure), the value of 0 for which the particle will memains at rest on plane is

Two particles each of mass in are fixed at y a. A particle of mass m is released from x 22 a, its speed when it reaches x0 due to gravitational attraction of fixed masses is

In figure shown, ifin is slightly displaced along dotted line then find angular frequency of ascillations.,M m M

A particle of mass m is at the stable equilibrium pasition of its potential energy V(x) axbx, where a, b are positive constants. The minimum velocity that has to be imparted to the particle to render its mation unstable is

Consider the mation of a classical particle in a onedimensional. doublewell patential V(x) (x 9) . If the particle is displaced infinitesimally from the minimum the ve axis (and friction is neglected) then the motion of the particle will be

A particle of mass, m4 moves along the xaxis under the influence of the potential V(x) if the particle oscillates with 2e small amplitude around the minimum potential, what is the period of oscillation

a) b) c) d)

..A salid spherical cark of radius R and specific gravity 0.5 float on water. The cark is pushed down so that its centre of mass is at a distance h (where och

In figure shown, black is released with zero initial velocity. Calculate maximum compression produced Note We can not apply equilibritim when permanent rest is not present. Only, apply when permanent rest is present. K100 oros 370 5m H 0.5

In the figure shown coefficient of friction bw the black and inclined plane is p. What should be the value of F so that black slides up the plane with constant speed.

A block of mass 2kg is at rest on a horizontal rough surface (10.5) A horizontal force F 5t is applied on the black at t0. What is speed after 4 sec.

In figure shown, the black is thrown up the inclined plane with some speed. If t, is time for upward motion and to is time for down ward mation, then find to p to,N 0 FK my sino mgmgcaso

A projectile is thrown with speed u at 0 angle with horizontal. Calculate its angular momentum about paint of projection after timet..

A particle is projected with speed up at 45 with horizontal. After what time K.E. of particle will become of its initial K.E. (0o 10W))

A particle starts from rest and moves with acceleration and then with retardation and finally comes to rest. If total distance moved is S. Calculate max. speed attained. Calculate average speed,

a) 50 m b) 55 m c) 45 m d) 58 m

A freely falling particle, falling from a tower of heighth covers a distance ha in the last second of its motion. The height of the tower is nearly (g 10 m32) 50m 55m 4.5 m 58m

Find the area under the particle.

If an abject is thrown with large speed so that it goes to large height than 9 constant in that case. If object returns to earth then path is ellipse.

A projectile is thrown at t0 with speed 10 ms at angle 30 with horizontal. After what time velocity vectar of projectile will be Ir to initial direction of velocit.

A particle of mass m is drapped from a height 3R above earth surface, where R is radius of earth. If M is mass of earth then calculate speed of particle near earths surface.

In the figure shown, write the equation of motion of particle (m, ) when it is given small displacement towards right.,A d 2 C d Q B

In figure shown, calculate distance moved by the block of 2 kg (i) in one second (ii) by the time it is about to leave contact with harizontal surface.,IFSino mg 45 F103t Flaso

1) What is the direction of the magnetic force if acting on a negative particle in both figures Draw or describe in words. B 1141 Vin x 100 B

The conducting rod shown below moves along parallel metal rails that are 25cm apart. The system is in a uniform magnetic field of strength 0.75 T, which is directed into the page. The resistances of the rod and the rails are negligible, but the section PQ has a resistance of 0.252. (a) What is the emf induced in the rod when it is moving to the

What is the magnetic field at P due to the current I in the wire shown a b P

Viewers of Star Trek have heard of an antimatter drive on the Starship Enterprise. Antimatter annihilates normal matter, producing pure energy. One possibility for such a futuristic energy source is to store antimatter charged particles in a vacuum chamber, circulating in a magnetic field, and then extract them as needed. What strength magnetic

What is the direction of the induced current (if any) in the following two situations Draw or describe in words. B increasing

At time t = 0, an object is launched from ground level, with an initial speed of 80 m/s and at a launch angle ????i such that cos ????i = 2/3 and sin ????i = 3/4. The object then travels in a symmetric, parabolic path. What is the objects height above the ground 1 second before it reaches the top of its path? A. 145 m B. 150 m C. 175 m D. 125 m E.

Measurement is the determination of the size or magnitude of something. By comparing that unknown quantity with some standard quantity of equal nature, known as the measurement unit. The figure below shows six identical cylindrical rods arranged side by side and kept in place by two wooden blocks. This arrangement is to enable the diameter of a

In what direction does heat flow? (a) From high temperature to low temperature (b) Temperature makes no difference (c) From low temperature to high temperature

Why is it difficult to know with certainty the amount ofextractable oil in rock formations? A. There is frictional resistance to fluid flow in the rock porespaces. B. The viscosity of the oil prevents total removal of all oil inthe pore spaces. C. The amount of pore spaces and their connectivity (i.e. Permeability) vary throughout any rock

1. When visiting Yosemite, campers staying in Curry Village are warned by park rangers to store food in lockers outside the cabins to keep bears from getting into your supplies (and never leave food in your car bears have broken in to get at a single candy bar wrapper). However, bear lockers are not available when camping in the wilderness and the

A 13.5 nC charge is at x 0cm and a 1.4 nC charge is at x 7 cm. Part A At what point or points on the xaxis is the electric potential zero Express your answer using two significant figures. If there is more than one answer, give each answer separated by a comma. IO Submit Request Answer www T cm

A combination work of artmusical instrument is illustrated. (Figure 1) Six pieces of identical piano wire (cut to different lengths) are hung from the same support, and masses are hung from the free end of each wire. Each wire is 1, 2, or units long, and each supports 1, 2, or 4 units of mass. The mass of each wire is negligible compared to the

4. You release a frictionless cart at the top of each of the 2 ramps. Both carts are released from rest. The ramps have the same height as each other at the starting and finishing points. One has a small bump up then down just before the end. The other has a small bump down then up. Which cart has the larger speed at the finish Why Ramp A start

Questions 1. Is the magnet field Baxial positive or negative Why If it is negative, how to make it positive,Experiment 6.2 Magnetic Field of a Solenoid Purpose Measure the magnetic field inside a solenoid. Equipment A solenoid (2920 turns, 9.8 cm long, 3 cm in diameter), 2axis magnetic field sensor (PS2162) with a homemade guide tube and a

Tarzan swings on a 30.0m long vine initially inclined at an angle of 37.0 o with the vertical. What is his speed at the bottom of the swing Question: (a) if he start from rest? (b) If he pushes off with a speed of 4.00 m/s? Formula: This problem does not include the potential energy of the spring. So, you can exclude in solving for

AU 8

Which will have a greater value of acceleration? Why? a. mass 1 (blue) b. mass 2 (orange) c. none Compute the value of the acceleration in either mass. Suppose M 1 is 200 grams and M 2 is 70 gr. As you can see in the picture is a 2 equations with 2 unknowns system. One acceleration is exactly the double than the other. Show your work.

This is a sketch of a double pulley set up. If M (blue) is heavier than M (orange)

Three charges (q1 5.4 C, q2 3.4 C, and q3 2.7C) are located at the vertices of an equilateral triangle with side d 8.3 cm as shown. 1) What is F3,x, the value of the xcomponent of the net force on q3 (N) 2)What is F3,y, the value of the ycomponent of the net force on q3(N) 3)A charge q4 2.7 C is now added as shown. What is F2,x, the

Part D Rank in order, from least stable to most stable, the three glasses of water shown. Rank the glasses from least stable to most stable. If two glasses have the same stability, place one on top of the other. short, fat glass Least stable tapered glass tall, narrow glass Reset Help Most stable

5. The figure shows a laser beam coming from the left, deflected by a 30 60 90 prism. What is the prisms index of refraction 30 60 17,3. A ray of light in air is refracted as it goes into glass undergoes total internal reflection off of air at the bottom surface of the glass and is then refracted again as it goes back up through the glass back

CONVEX LENSES 1. A small bulb is placed in front of a convex lens. a Suppose that the bulb is placed as shown. Using all three principal rays, draw an accurate ray diagram to determine the location of the image. Label the image location. b. Repeat part a for the case shown at right, in which the bulb is farther from the lens. d. The small bulb is

I In the sketch to the right, a long straight wire is in the plane of a rectangular conducting wire loop. The current in the straight wire is up. At some point the current in the straight wire starts to increase in magnitude. This increased current leads to an induced current in the wire loop. In which direction will the induced current in the

Two large flat plates are separated by a distance d. The plates are connected to a battery. a. The surface area of the face of each plate is A,. Write an expression for the capacitance in terms of A, and d. b. A new capacitor is formed by attaching two uncharged metal plates, each with area A,, to the capacitor as shown. The battery remains

Before working on this primer, you may need to review . The slopeintercept form of a straightline equation . Finding the slone of a line Figure 654321012 1 2 3 4 11 of 11 Fo 5 6 7, Part DFinding a velocity graph from a position graph Which is the correct velocity vs time graph for the position vs. time graph shown in (Figure 11) View Available

Precarious Lunch A uniform steel beam of length I and mass m is attached via a hinge to the side of a building. The beam is supported by a steel cable attached to the end of the beam at an angle 0, as shown. Through the hinge, the wall exerts an unknown force, F, on the beam. A workman of mass m sits eating lunch a distance d from the building.

Two currentcarrying wires are exactly parallel to one another and both carry 2.5 A of current. The two wires are separated by a distance of 15 cm. The current in wire 1 moves down and the current in wire 2 also moves down. What is the magnitude of the magnetic force per unit length caused by wire 1 on wire 2 What is the direction of the magnetic

Two particles, 1 and 2, each of mass m, are attached to the ends of a rigid mass less rod of length L L. The rod is held horizontally on the fulcrum and then released. The distance of particle 1 from the fulcrum is L 1.0 m and distance of particle 2 from the fulcrum is L 5.0 m. What is the magnitude of the initial acceleration of particle 2 4 12

The wrench in the figure has six forces of equal magnitude actingon it. Rank these forces (A through F) on the basisof the magnitude of the torque they apply to the wrench, measuredabout an axis centered on the bolt. Rank from largest to smallest. To rank items as equivalent, overlap them.

A B F E D C

How many grams of a 5.00% m/m lactate solution are needed to provide 8.25 g of lactate? A) 1.65 g B) 165 g C) 41.3 g D) 4.13 g

Two tugboats pull a disabled supertanker. Each tug exerts a constant force of 2.10x106 N, one at an angle 16.0 west of north, and the other at an angle 16.0 east of north, as they pull the tanker a distance 0.790 km toward the north. O Part A What is the total work done by the two tugboats on the supertanker Constants Express your answer in

For this question consider the figure to the right shows an energy level diagram for a certain atom (not hydrogen). Several transitions are shown and are labeled by letters. Note The diagram is not drawn to scale. a) Which transition corresponds to the emission of the photon with the longest wavelength b) Which transition corresponds to the

Problem 20.6Enhanced with Feedback Two identical metal spheres A and B are in contact. Both are initially neutral. 1.0 x 102 electrons are added to sphere A then the two spheres are separated. You may want to review (pages 639641) Part A Afterward, what is the charge of sphere A Express your answer to two significant figures and include the

3. A rigid body is acted upon by four forces and a couple as shown. (A) Replace the given system by a single force R. Showlocate R on the body indicating its magnitude, direction and position. (B) Find its equivalent system consisting of a single force acting at O and a couple. Draw this equivalent system. 280 N 80 N 12 8 m 6 m 500 Nm 800 N 10 m

What is the value of resistor R inthe figure below, in which I = 8 A and V = 34 V?

W 10 I 15 R

Part A What is the resistance of a Nichrome wire at 0.0 C if its resistance is 200.000 at 11.5 C Express your answer using four significant figures. R , , , 114.5 Submit Try Again R I, , , T 4.14 reset shortcuts help Part B What is the resistance of a carbon rod at 25.8 C if its resistance is 0.01600 at 0.0 C Submit My Answers Give Up reset

A rocketpowered hockey puck moves on a horizontal frictionless table. The figures shows graphs of vxand Vy, the x and ycomponents of the pucks velocity. The puck starts at the origin. V (ms) 10 0 10 5 t (s) 10 Vy 10 (ms) 0 10 5 10 t (s),Part A What is the magnitude of the pucks acceleration at t 5 s Express your answer to two significant figures

A train moving with certain speed crosses a person moving at 4 km/hr and another person moving at 6 km/hr in 12 sec and 14 sec respectively. Find the speed of train (if both persons are moving in the opposite direction of train respectively.)

Rank the states on the basis of the pressure of the gas sample at each state. Rank pressure from highest to lowest. To rank items as equivalent, overlap them. T C A F D B E V

An RL circuit is driven by an AC voltage source as shown in the figure.

R L

B Q 3.4C Q 9.1 C A,Two charges Q1 and Q2 occupy two corners of a rectangle as shown below. These charges produce electric field in the surrounding region. Rectangle dimensions are (3.5 cm x 5.5 cm). Find the magnitude and the direction of net electric field at point A. Find the magnitude and the direction of net electric field at point B. If a

A force of 90 pounds is used to pull an object along a level surface. The force is applied at an angle of 43 to the surface and moves the object a total of 250 feet. How much work was done Round the answer to the nearest footpound.

A plane electromagnetic wave propagates in a lossless medium and has a relative permeability coefficient of 8 and a relative permittivity of 1. impede this medium. A plane electromagnetic wave propagates in a lossless medium and has a relative permeability coefficient of 8 and a relative permittivity of 1. impede this medium. She O 120m20 120m30

Design (i.e., check against sliding, overturning and location of the resultant force for) a 15foothigh concrete cantilever retaining wall with a vertical back face in a horizontal sandy soil (y115 pcf and (N)60.avg26). The retaining wall shall be designed to support a traffic load that can be represented by an equivalent surcharge load of q 600

(a) (b) (c) (d) You are given a voltmeter, microammeter, a 12 volt DC battery, enough connecting wires, a variable resistor, a switch, and a resistor of 100 ohms. Draw the symbols of all these electrical components and label them After connecting an appropriate circuit, several readings are obtained by changing the voltage in the circuit. Explain

A circuit is constructed with an AC generator, a resistor, capacitor and inductor as shown. The generator voltage varies in time as V Vb Emsinwt, where m 120 V and w 712 radianssecond. The values for the remaining circuit components are R 82 02, L 116.5 mH, and C 10.9F. a d sin(t) ww R 0000 C,1) What is Z, the impedance of the circuit

A 800g ball is pulled up a slope as shown in the diagram. Calculate the potential energy it gains. 20cm 50cm

Madrid FC own land in the metropolitan area of Madrid. They would like to build a sports complex which would include stateof the art training facilities for elite athletes. Your consultancy office with the help of architects and sports consultant have drawn up three different projects) (i) 10 hectare site with small capacity for athletes (ii) 20

In Milestone Three, you will submit your discussion of the life cycle management (Section III) of your business product, service, or other idea from your business plan in the Marketing and Strategy course. Prompt In this milestone, consider the sustainability of your idea in the marketplace from initial inventory to subsequent sustainment in the

A marble is rolled off of a 45cm high table three times. The first time it travels 0.24m in 0.70 seconds. The second and third time it rolls 0.23m in 0.70 seconds. Find the final velocity in the y direction and initial velocity in the x direction.

Two charged spheres X, Y are put in contact with a total charge of +12Q. Another charged sphere, Z, came into contact with X and Y. After electrostatic equilibrium among the three, Y is then separated from both X and Z resulting to the final charge of Y as-6Q. Assuming X, Y, and Z are identical in size, what is the original charge of Z? (A) 18Q

The electrostatic force on a small sphere of charge 0.2 C due to another small sphere of charge -0.5 C has magnitude 0.4 N. k= 8.99x109 Nm2 /C2 . (a) Identify the nature of the force on the second sphere due to the first. (b) Calculate the distance between the two spheres.

Explain the following behavior of molecules. a. When it is raining it is advisable not to touch a canvas tent from inside (2mk) b. Water rises up in harrow tubes but Mercury which is also a liquid falls in a narrow tubes to level below the outside surface ?(2mk)

26 Explain briefly why a razor blade floats in water and when soap solution is carefully added to the water it sinks (3mk)

Which of the following frequencies will be suitable for beyondthehorizon communication using sky waves (a) 10 kHz (b) 10 MHz (c) 1 GHz (d) 1000 GHz

Frequencies in the UHF range normally propagate by means of (a) Ground waves. (b) Sky waves. (c) Surface waves. (d) Space waves.

2) How will you make a child to understand the Intensity of light or sound from Density without using formulae?

A device to throw a ball is constructed from a 1.51 m long rod that spins around an axis located at one end, and at the other end is a mechanism that releases the ball when the apparatus reaches 608 RPM. Calculate the tangential speed of the ball just as it is released.

given by In a solid sphere of radius a, the surface is maintained at the temperature f(0) k cos 0. 00