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Class 12 Physics Practice Test: Coulomb's Law
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Class 12 Physics Practice Test: Coulomb's Law
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13 Questions

1. What is the C.G.S. unit of charge?
2. Two charges q1, q2 exert some amount of force on each other. What will happen to the force on q1 if another charge q3 is brought close to them?
3. Two negative charges are kept at a certain distance in the air medium. What will happen if a dielectric slab is inserted between them?
4. According to Coulomb’s Law force between two charges is k*q1*\(\frac {q_2}{r^2}\). What will happen if one of the charges is zero?
5. Coulomb’s Law is valid for ______
6. Two 1 Coulomb charges are kept at 1m distance in air medium. Force of attraction or repulsion between them will be ________
7. Let B be the midpoint of AC. Two point charges Q are placed at A and C. What should be the value of charge placed at B so that the system remains at equilibrium?
8. What will be permittivity of a medium which has dielectric constant 5.4?
9. Coulomb’s Law is valid for any distance between the particles.
10. Which one of the following is similar between electrostatic force and gravitational force?
11. 1 emu = __________ C
12. The dimension of εo _______
13. If the force between two charges is 9N, what will be the force if the distance between them is doubled and both the charges are increased to √2 times?

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