GENERAL PHYSICS 2

Please read the instructions and questions in every number (#1 to #15), and please provide the best answers (letters) with brief but effective solutions.

Thank you so much dear tutors!!

Instructions: Choose the letter of the best/correct answer. Blacken the circle (o) on the answer sheet which 1. In electric line of force a. Start from positive charges and end on neutral charges b. Start from neutral charges and end on negative charges c. Star form positive charges and end on negative charges. d. Starts from negative charges and end on positive charges. 2. A rubber comb runs through human hair. What charge is acquired by the hair and by the comb? a. Hair becomes positively charged; comb becomes negatively charged b. Hair becomes negatively charged; comb becomes positively charged c. Hair and comb become negatively charged d. Hair and comb become positively charged 3. The properties of attraction and repulsion are often used to show that an object is charged EXCEPT: a. a charged rod can pick up small pieces of paper b. a charged balloon can stick to the wall by attraction c. a charged rod can pull a stream of water towards it d. a sticky bubble gum sticks to the wall For numbers 4 and 5. (Coulombs' Law) Two protons are separated by a distance of 3.8 x 10-10 m in air. Given: r = 3.8 x 10-10 m m = 1.673 x 10-27 kg q' = 1.602 x 10-19 C 4. Find the magnitude of the electric force one proton exerts on the other a. 1.60 x 10 -19 N b. 1.02 x 10 -55 N c. 1.294 x 10 45 N d. 3.64 x 10 -2 N 5. Find the magnitude of the gravitational force one proton exerts on the other. a. 1.60 x 10 -19 N b. 1.02 x 10 -55 N c. 1.294 x 10-45 N d. 3.64 x 10 -2 N 6. Which of the following is TRUE about electric field lines? a. They point away from a positive charge b. They point toward a negative charge c. they never cross one another d. all of the above7. If you are inside a car and the car is struck by lightning, it is best to stay inside because the electric field inside the car is a. Zero c. huge for a very long time b. huge for a short time d. small enough to be safe 8. What is the total electric flux through a closed surface containing a 2.0 pc charge? a. 1.8 x104 N.m2/C 4.5 x103 N.my/C b. 2.3 x105 N.m2/C d. 1.4 x105 N.my/C 9. It is the measure of the electric field through a given surface. a, Potential energy c. electric current b. electric flux d. magnetic field 10. The statement "When static conditions are reached, the charge on a conductor resides on its surface" results directly from Gauss's law and from the principle that the electric field inside the conductor is a. Zero c. parallel to the surface b. very large d. perpendicular to the surface 11. It states that the total electric flux through a surface is the total electric charge inside the surface divided by E. (E. is defined as permittivity of free space) a. Coulomb's law . b. Gauss's Law c. Ohm's Law d. Lenz's Law 12. It is the electric energy per unit positive test charge. a. Electric potential c. Capacitor b. Potential Difference d. Capacitance 13. It is a device for storing charges; usually consists of two parallel plates separated from each other. a. Battery b. voltmeter C. wires d. capacitor 14. What is the SI unit of capacitance? a. Coulomb b. farad c. faraday d. joule For items 15-17, C1 The series combination of 5.0 F and 20.00 F capacitors is connected in parallel to a 40.00 F capacitor C2 15. The equivalent capacitance is a. 3.6 F b. 15.0 F C. 44 F d. 65 F