NCERT Class 12 Chapter 2 Physics Electrostatic Potential and Capacitance MCQs Quiz 2

1. Equipotential surfaces

Oxidation reaction

Reduction reaction

Disproportionation reaction

Decomposition reaction

2. Dielectric constant for a metal is

infinite

1

10

zero

3. When air is replaced by a dielectric medium of constant K, the maximum force of attraction between two charges separated by a distance

decreases K times

increases K times

remains unchanged

increases K-1 times

4. Two identical capacitors are joined in parallel, charged to a potential V, separated and then connected in series, the positive plate of one is connected to the negative of the other. Which of the following is true?

The energy stored in ths system increases.

The potential difference remains constant.

The potential difference between the free plates is 2V.

The charges on the free plated connected to-gether are destroyed.

5. Earth’s potential is _______

Highly negative

Zero

Highly positive

Varies from place to place

6. If a charged body is moved in an electric field against the Coulomb force, then ________

The total energy of the system decreases

Work is done on the body by an external agent

Work is done by the electric field

Electric field intensity decreases

7. Electric field intensity and electric potential at a certain distance from a point charge is 32 N/C and 16 J/C. What is the distance from the charge?

10 m

50 m

7 m

0.5 m

8. In which type of molecule positive and negative charges coincide with each other?

Bipolar

Polar

Non-polar

Unipolar

9. When is the effective capacitance of a capacitor increased?

When the capacitors are connected in series and parallel simultaneously

When the capacitors are connected in parallel

When the capacitors are connected in series

When the capacitors are randomly connected

10. Find the true statement.

A Van de Graff generators produces large resistance and less voltage

A Van de Graff generators produces large current and less voltage

A Van de Graff generator produces large voltage and less current

A Van de Graff generators produces large current and large resistance

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