Questions and Answers of Complete Physics For Cambridge IGCSE RG

a. The IGCSE class carries out an experiment to investigate the rate of cooling from 100 °C of a range of hot liquids. Copy out any of the following variables that are likely to have a significant
The IGCSE class is carrying out an experiment to determine the speed of sound in air. The diagram indicates the method used. The experiment is conducted outside the school building.Student A strikes
The diagram below shows the circuit that a student uses to find the resistance of a combination of three lamps.The voltmeter and the ammeter have not been drawn in.a. Copy the diagram and complete it
A student investigates the resistance of wire in different circuit arrangements. The circuit shown in the diagram below is used.The student measures the current I in the wire. She then measures the
A student is investigating the oscillation of a metre rule that has one end resting on the laboratory bench. The other end is held above the level of the bench by a spring attached at the 90.0 cm
The IGCSE class is investigating springs. A student measures the length /0 of a spring and then uses a stand and clamp to suspend the spring vertically. He hangs a weight Won the spring and measures
Emissions from a radioactive source pass through a hole in a lead screen and into a magnetic field, as shown in the diagram.Radiation detectors are placed at A, B and C. They give the following
a. A radioactive isotope emits only α-particles.i. Draw a labelled diagram of the apparatus you would use to prove that no β-particles or γ-radiation are emitted from the isotope.ii. Describe the
a. The graph below is the decay curve for a radioactive isotope that emits is only β-particles.Use the graph to find the value of the half-life of the isotope. Indicate, on the graph, how you
The most abundant stable isotope of strontium is strontium-88. Its nucleon number is 88 and its proton number is 38. In nuclide notation it is written yxSr.a. Write downi. The values of x and y for
a. State the electrical quantity that has the same value for each of two resistors connected to a batteryi. When they are in series,ii. When they are in parallel.b. The diagram below shows a circuit
a. Draw the symbol for a NOR gate. Label the inputs and the output.b. State whether the output of a NOR gate will be high (ON) or low (OFF) wheni. One input is high and one input is lowii. Both
In the laboratory demonstration shown in the diagram, a copper rod rolls at a steady speed down the sloping parallel copper rails. The rails are in the region of a strong magnetic field that acts
a. The transformer in the diagram below is used to convert 240 V a.c. to 6 V a.c.i. Using the information above, calculate the number of turns on the secondary coil.ii. Describe how the transformer
The diagrams show two views of a vertical wire carrying a current up through a horizontal card. Points P and Q are marked on the card.a. Copy the diagram above right. On your copyi. Draw a complete
The diagram below shows a high-voltage supply connected across two metal plates.When the supply is switched on, an electric field is present between the plates.a. Explain what is meant by an electric
An unstable nucleus has 137 neutrons and 88 protons. It decays by emitting a β-particle. How many neutrons and protons does the nucleus have after emitting the β-particle? neutrons protons A 136 88
An electrical circuit is shown below.The resistance of the lamp is 4.0 Ω when it is at its normal brightness. 12.0V d.c. 4.0 0 one metre resistance wire sliding contact
A transformer has 200 turns on its primary coil and 400 turns on its secondary coil. An AC voltage of 50 V is applied to the primary coil. If the current in the primary coil is 2.0 A and he
a. The diagram below shows a circuit containing a lamp and a variable resistor.The circuit does not work. The lamp does not light and altering the setting on the variable resistor makes no
Here is a combination of two logic gates. One input is set at I the other at 0: Which of the following accurately represents the states of P and Q?A. P is 0, Q is 1B. P is 1, 0 is 1C. P is 0, Q
The diagram below shows the parts of the electromagnetic spectrum.a. Name one type of radiation that hasi. A higher frequency than ultraviolet,ii. A longer wavelength than visible light.b. Some
Three resistances are arranged in this combination:What is the combined resistance?A. 18 ΩB. 9 ΩC. 6 ΩD. 2 Ω
a. The diagram below shows two rays of light from a point O on an object. These rays are incident on a plane mirror.i. Copy the diagram and continue the paths of the two rays after they reach the
Which component, used in electronic circuits, allows current to flow through in one direction only?A. TransformerB. ResistorC. ThermistorD. Diode
Here are five regions of the electromagnetic spectrum.microwavesinfraredvisibleultravioletX-raysa. Remote controllers for television sets send a beam of electromagnetic radiation to the television.
Two wires, X and Y are made of the same metal and are at the same temperature. Y is twice as long as X and has twice the cross-sectional area.Which of the following is correct?A. X and Y have the
The speed of sound in air is 332 mis. A man stands 249 m from a large flat wall, as shown in the diagram below, and claps his hands once.a. Calculate the interval (in s) between the time when the man
An object is being viewed through a convex lens which is being used as a magnifying glass.Which of the following accurately describes the image?A. The image is virtual and just in front of the eye.B.
a. The speed of light in air is known to be 3.0 x 108s m/s.Outline how you would use a refraction experiment to deduce the speed of light in glass. You may draw a diagram if it helps to clarify your
A loudspeaker emits sound waves of frequency 640 Hz. They travel through cold air at a speed of 320 m/s. What is their wavelength?A. 20mB. 2.0 mC. 0.5mD. 0.05 m
In a thunderstorm, both light and sound waves are generated at the same time.a. How fast does the light travel towards an observer?b. Explain why the sound waves always reach the observer after the
Copper is a much better thermal conductor than glass. Which of the following is the only accurate explanation for this?A. In glass, there are free electrons between the atoms that block the transfer
The diagram below shows the path of a sound wave from a source X.a. State why a person standing at point Y hears an echo.b. The frequency of the sound wave leaving X is 400 Hz. State the frequency of
Air is trapped in a cylinder at a pressure of 1200 kPa. A piston is pulled out slowly so that the air expands to three times its volume. Assuming that there is no change in temperature, what
The diagram below shows white light incident at P on a glass prism. Only the refracted red ray PQ is shown in the prism.a. Copy the diagram and draw rays to complete the path of the red ray and the
The table shows the performance of four electric motors of slightly different designs. Which motor has the highest efficiency?A. Motor AB. Motor BC. Motor CD. Motor D B C A D input power /W 200
a. State two differences between evaporation of water and boiling of water.b. The specific latent heat of vaporization of water is 2260 kJ/kg. Explain why this energy is needed to boil water and why
Which of these units is the same as the watt (W)?A. JB. J/m2C. J/sD. J/s2
The diagram below shows apparatus that a student 2. uses to make an estimate of the specific heat capacity of iron.a. The power of the heater is known. State the four readings the student must take
For which of the following energy resources did the energy not originally come from the Sun?A. NuclearB. TidalC. OilD. Hydroelectric
The diagram below shows a thermocouple set up to measure the temperature at a point on a solar panel.a. X is a copper wire.i. Suggest a material for Yii. Name the component Z.b. Explain how a
A spring obeys Hooke's law when stretched. The table gives some information about the length of the spring when dick rent loads are applied.What is the extension of the spring when the load is 5 N?A.
The diagram below shows a way of indicating the positions and direction of movement of some molecules in a has at one instant.a. i. Describe the movement of the molecules.ii. Explain how the
What force is needed to give a car of mass 1000 kg an acceleration of 2 m/s2A. 500 NB. 2000 NC. 2000 kgD 50 N
a. Equal volumes of nitrogen, water and copper at 20 °C are heated to 50 °C.i. Which one of the three will have a much greater expansion than the other two?ii. Explain your answer in terms of the
A motorcycle accelerates from rest. The graph shows how its speed changes with time.What is the acceleration of the motorcycle over the first 10 seconds?A. 30 m/sB. 30 m/s2C. 1.5 m/s2D. 3.0 m/s2
a. The illustrations show a beaker in which coffee is served at an airport kiosk.The beaker itself is made of two layers of cardboard. It has a thin plastic lid.i. State two sources of heat loss that
A sample contains 800 mg of a radioactive material, which emits a-particles. The material has a half-life of 6 days. What mass of material is still radioactive after 18 days?A. 0 mgB. 100 mgC. 200
A man is delivering a cupboard to a house.a. The man trolls the cupboard at a steady speed from the lorry to the house. The friction force in the wheels is 40 N. State the force with which the man
A transformer has 200 turns on its primary coil and 400 turns on its secondary coil. An AC voltage of 50 V is applied to the primary coil.What is the voltage across the secondary coil?A. 25VB. 50VC.
A rock climber climbs up a rock face, as shown in the diagram below.a. To climb the rock face, the climber must do work. Which one of the following forces must the climber work against as he
In the circuit below, the 12 V lamp glows when switch s is open.If switch S is then closed, what happens to the brightness of the lamp?A. It stays the same.B. It goes off.C. It becomes dimmer.D. It
The diagram below shows the arm of a crane when it is lifting a heavy box.a. By the use of a scale diagram (not calculation) of the forces acting at P, find the weight of the box.b. Another box of
The voltage and current ratings of four electric heaters are shown in the table below. Which of the heaters has the highest resistance? voltage / V current / A A 110 4.0 110 8.0 230 4.0 D 230 8.0
The diagram below shows a simple pendulum that swings backwards and forwards between P and Q.a. The time taken for the pendulum to swing from P to Q is approximately 0.5 s. Describe how you would
Which component, used in electronic circuits, has a resistance which falls when the temperature rises?A. TransformerB. RelayC. ThermistorD. Resistor
The diagram below shows a driver 50 m below the surface of the water.a. The density of water is 1000 kg/m3 and the acceleration of free fall is 10 m/s2. Calculate the pressure that the water exerts
The chart above shows the main types of radiation in the electromagnetic spectrum. Two haven't been named. Which type does P represent?A. MicrowavesB. Sound wavesC. Gamma raysD. Ultraviolet long -
The diagram shows an aeroplane of mass 3.4 x 105 kg accelerating uniformly from rest along a runway.After 26 s it reaches a speed of 65 m/s.a. Calculatei. The acceleration of the aeroplaneii. The
Waves in a ripple tank spread out when they pass through a gap like this:This effect is calledA. diffractionB. ReflectionC. RefractionD. Radiation
A bucket is full of oil. The total mass of the bucket of oil is 5.4 kg and the gravitational field strength is 10 N/kg.a. Calculate the total weight of the bucket of oil.b. The bucket of oil is hung
An alarm is too quiet, so a technician adjusts it to produce a louder note of the same pitch. What effect does this have on the amplitude and on the frequency of the sound? amplitude frequency A
The diagram below shows apparatus for investigating moments of forces.The uniform metre rule shown in the diagram above is in equilibrium.a. Write down two conditions for the metre rule to be in
A vacuum flask has double walls of glass or steel with a vacuum between them. Which kinds of heat transfer are reduced by the vacuum?A. Convection and radiationB. Conduction and convectionC.
A solid plastic sphere falls towards the Earth. The diagram below shows the speed-time graph of the fall up to the point where the sphere hits the Earth's surface. a. Describe in detail the
When a vehicle is travelling along, the temperature of its tyres increases. This causes the air pressure in the tyres to rise. Why is this?A. The molecules in the air increase in numberB. The
This question is about trucks from a small train in a park:One truck, mass 240 kg, is given a push and released at a speed of 3 m/s. It collides with a bigger, stationary truck of mass 360 kg and
A manometer, containing water; is used to measure the pressure of a gas supply in a school laboratory. Its reading is h cm of water.Why is it better to use water in the manometer, rather than
Some fat purchased from a shop is supplied as the block shown below. Use the information in the diagram to calculatea. The volume of the block (in cm3),b. The density of the fat. Give your
The diagram shows the two forces acting on a small object.Which of the following is the resultant force on the object?A. 8 N downwardsB. 8 N upwardsC. 2 N downwardsD. 2 N upwards 3 N 5 N
A wheel is rotating at approximately 2 revolutions per second. Describe how you would use a stopwatch to measure as accurately as possible the time for one revolution of the wheel. Make sure you
A large electric motor is used to lift a load off a lorry. Which of the following values would be enough for you to calculate the power of the motor?A. The current used and the work done.B. The force
The diagram below shows the speed—time graph of part of a short journey made by a cyclist.a. Which part of the graph shows when the cyclist is travelling at constant speed?b. State what is
Which type of power station does not use steam from boiling water to turn the generators?A. Coal-firedB. HydroelectricC. GeothermalD. Nuclear
a. State what is meant by the termsi. Weight,ii. Density.b. A student is given a spring balance that has a scale in newtons. The student is told that the acceleration of free-fall is 10 m/s2.i.
A motorcycle accelerates from rest. The graph shows how its speed changes with time.What distance does the motorcycle travel before it reaches a steady speed?A. 3 mB. 30 mC. 150 mD. 300 m speed m/s
Drops of water from a cracked gutter fall past the window of an IGCSE Physics student’s room, as shows in the diagram.The student uses a digital stopwatch to find the time between one drop and the
The diagram below shows the mass of measuring cylinder before some liquid is poured into it and then after.What is the density of the liquid?A. 100/160 g/cm3B. 100/130 g/cm3C. 190/160 g/cm3D. 100/130
Isotopes of the radioactive element uranium occur naturally in small proportions in some rocks. The table gives information about one uranium isotope.a. How many neutrons are there in an atom of this
A radioactive isotope of gold has the symbol 19686Au. If this isotope is injected into the bloodstream of a patient, it can be used by doctors as a tracer to monitor the way the patient's heart
This question is about information in a leaflet.a. Extract 1 'Radon is a naturally occurring radioactive gas. It comes from uranium which occurs in rocks and soils.'i. Explain the meaning of the word
a. i. Explain why some substances are radioactive and some are not.ii. State the cause of background radiation.iii. Explain what you understand by the meaning of the half-life of a radioactive
This question is about an accident at the Chernobyl nuclear power station in which radioactive gas and dust were released into the atmosphere. The radioactive isotopes in the Chernobyl fallout which
Phyl is in hospital. She is injected with the radioisotope technetium-99m.This isotope is absorbed by the thyroid gland in her throat. A radiation detector placed outside her body and above her
Phosphorus-32 is a radioactive isotope. It can be used to prove that plants absorb phosphorus from the soil around them.a. i. The stable isotope of phosphorus has a mass number of 31. State the
The table above shows information about a radioisotope of iron called iron-59.a. Calculate:i. The number of neutrons in the nucleus;ii. The total number of charged particles in a single atom of
The symbol 3517Cl represents one atom of chlorine.a. State the names and numbers of the different types of particle found in one of these chlorine atoms.b. State where these particles are to be found
a. Copy and complete the following sentences using words from the above list. Each word may be used once, more than once or not at all.i. Radioactive substances have atoms with unstable ________.ii.
In the circuit above, the processor (a transistor) is switched on when the voltage between terminals E and B is more than 0.6 V. This means that a current can then flow between E and C. so the lamp
Select from the above list:a. An input device which detects changes in light.b. An output device which produces a soundc. A processing device which only gives an output when both inputs are high.
a. All electronic systems have input sensors, processors and an output device. Explain the function ofi. Input sensorsii. processors.b. The block diagram below shows an electronic system that can be
A truck is fitted with a security device. To start the truck, two keys are needed. The first key operates a 'hidden' switch, the second key operates the ignition switch.If the 'hidden' switch and the
The diagram below shows part of an electronic circuit.a. What is component Z called? What does it do?b. Give two ways in which the output of the circuit is different from the input.c. What difference
The devices below are all used in electronic circuits.Which of the above is best described by each of the following statements?a. Glows when a small current flows in it.b. Links two circuits so that
The diagram shows a circuit fora temperature sensorThe temperature of the thermistor rises.a. What happens to the resistance of the thermistor?b. What happens to the voltage across resistor R? o+5 V
Diagrams X and Y above show the symbols for two logic gates.a. Which symbol represents an AND gate?b. With an AND gate, if one input is I (high) and the other is CI (low), what is the output state?c.
In the diagram above, the tanks contain two different liquids, X and Y. a. What is the volume of each liquid in m3? b. If you had 1 m3 of the liquid X, what would its mass be? c. What
a. The table gives the melting and boiling points for lead and oxygen.i. At 450 °C will the lead be a solid, a liquid or a gas?ii. At -200 °C will the oxygen be a solid, liquid or a gas?b. The
A simple burglar alarm has two sensors:• A heat source, which gives a high output when someone is nearby.• A light sensor, which gives a high output when light shines on it.A thermistor is used

Showing 1 - 100 of 195