A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 4 - Capacitance and Capacitors>EXERCISE 4>Q 13

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12th West Bengal Board

IMPORTANT

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Find the equivalent capacitance between the points $A$ and $B$ of the given network of capacitors in the figure .

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 14

A

900 pF

capacitor is charged by a

100 V

battery. How much energy is stored by the capacitor ?

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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 15

Explain why presence of a conductor nearby affects the capacitance of a conductor.

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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 16

What is a capacitor? Define capacitance of a capacitor.

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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 17

Two large conducting spheres carrying charges

Q_{1}

and

Q_{2}

are brought close to each other. Is the magnitude of electrostatic force between them exactly given by

Q_{1} Q_{2} / 4 π ε_{0} r^{2},

where

r

is the distance between their centers?

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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 18

Can there be a potential difference between two adjacent conductors that carry equal positive charges ?

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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 19

If you are provided with capacitors with small capacitances, how can you obtain a large capacitance ?

MEDIUM

12th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 4 - Capacitance and Capacitors>EXERCISE 4>Q 20

The graph shows the variation of the total energy $(E)$ stored in a capacitor against the value of the capacitance $(C)$ itself. Which of the two, the charge on the capacitor or the potential used to charge the capacitor is kept constant for this graph.

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