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A parallel plate capacitor is charged, What will happen if the plates are pulled apart ?

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Important Questions on Capacitance and Capacitors

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12th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 4 - Capacitance and Capacitors>EXERCISE 4>Q 29

A capacitor of capacity

10 μ F

is charged to potential of

400 V

. When it's both plates are connected by a conducting wire, then heat generated will be

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 4 - Capacitance and Capacitors>EXERCISE 4>Q 30

A capacitor of capacitance

C

is charged to a potential

V

. The flux of the electric field through a closed surface enclosing the capacitor is

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 4 - Capacitance and Capacitors>EXERCISE 4>Q 31

A 2 μ F

capacitor is charged as shown in figure. The percentage of its stored energy dissipated after the switch

S

is turned to position

2

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 4 - Capacitance and Capacitors>EXERCISE 4>Q 32

In the given circuit, Fig. the value of capacitance, so that an equivalent capacitance between $A$ and $B$ is $3 μ F$ , is

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 4 - Capacitance and Capacitors>EXERCISE 4>Q 33

A 10 μ F

capacitor and a

20 μ F

capacitor are connected in series across a

200 V

supply line. The charged capacitors are then disconnected from the line and reconnected with their positive plates together and no external voltage is applied. The potential difference across each capacitor is

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 4 - Capacitance and Capacitors>EXERCISE 4>Q 34

Two parallel plate capacitors of capacitances

C

and

2 C

are connected in parallel and charged to a potential difference

V_{0}

. The battery is then disconnected and the region between the plates of the capacitor

C

is completely filled with a material of dielectric constant

2 .

The potential difference

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 4 - Capacitance and Capacitors>EXERCISE 4>Q 35

A parallel plate capacitor with air between the plates has a capacitance of

9 μ F

. The separation between its plates is

d

. The space between the plates is now filled with two dielectric. One of the dielectrics has dielectric constant

K_{1} = 3

and thickness

\frac{d}{3}

while the other one has dielectric constant

K_{2} = 6

and thickness

\frac{2 d}{3} .

Capacitance of the capacitor is now

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 4 - Capacitance and Capacitors>EXERCISE 4>Q 36

How many

6 μ F, 200 V

condensers are needed to make a condenser of

18 μ F, 600 V

A parallel plate capacitor is charged, What will happen if the plates are pulled apart ?

Important Questions on Capacitance and Capacitors

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