A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 4 - Capacitance and Capacitors>EXERCISE 4>Q 24

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A capacitor of capacitance value $1 μ F$ is charged to $30 V$ and the battery is then disconnected. If the remaining circuit is connected across a $2 \mu \mathrm{F}$ capacitor, the energy lost by the system is

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Important Questions on Capacitance and Capacitors

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 4 - Capacitance and Capacitors>EXERCISE 4>Q 25

What is the final charge on the capacitor? A

20 μ F

Capacitor is connected to a

45 V

Battery through a circuit whose resistance is

2000 Ω

.

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 4 - Capacitance and Capacitors>EXERCISE 4>Q 26

Two parallel large thin metal sheets have equal surface charge densities

(σ = 26.4 \times 10^{- 12} {Cm}^{- 2})

of opposite sign. The electric field between these sheets is

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 4 - Capacitance and Capacitors>EXERCISE 4>Q 27

C, V, U

and

Q

are capacitance, potential difference, energy stored and charge of a parallel plate capacitor respectively. The quantities that increase when a dielectric slab is introduced between the plates without disconnecting the battery are

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 4 - Capacitance and Capacitors>EXERCISE 4>Q 28

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

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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

is

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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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