Electrostatics-Capacitors (NEET Physics): Questions 18 - 20 of 29

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Question number: 18

» Electrostatics » Capacitors

MCQ▾

Question

A parallel plate capacitor is charged and the charging battery is then disconnected. If the plates of the capacitor are moved further apart by means of insulating handles, then

Choices

Choice (4) Response

a.

The electrostatic energy stored in the capacitor increases

b.

The voltage across the plates decreases

c.

The charge on the capacitor increases

d.

The capacitance increases

Question number: 19

» Electrostatics » Capacitors

MCQ▾

Question

Figure given below shows two identical parallel plate capacitors connected to a battery with switch S closed. The switch is now opened and the free space between the plates of capacitors is filled with a dielectric of dielectric constant 3. What will be the ratio of total electrostatic energy stored in both capacitors before and after the introduction of the dielectric?

Circuit Diagram - Two identical parallel plate capacitors

Circuit Diagram - Two Identical Parallel Plate Capacitors

Two identical parallel plate capacitors connected to a battery with switch S closed.

Choices

Choice (4) Response

a.

5: 1

b.

3: 1

c.

3: 5

d.

5: 3

Question number: 20

» Electrostatics » Capacitors

Assertion-Reason▾

Assertion (Ꭺ)

If the distance between parallel plates of a capacitor is halved and dielectric constant is made three times, then the capacitance becomes 6 times.

Reason (Ꭱ)

Capacity of the capacitor does not depend upon the nature of the material of plates.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

b.

Both Ꭺ and Ꭱ are false

c.

Ꭺ is false but Ꭱ is true

d.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

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