If W be the amount of heat produced in the process of charging an uncharged capacitor then the amount of energy stored in it is

(1) 2W

(2) W2

(3) W

(4) zero

Subtopic:  Energy stored in Capacitor |
From NCERT
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A metallic sphere of capacitance C1, charged to electric potential V1 is connected by a metal wire to another metallic sphere of capacitance C2 charged to electric potential V2. The amount of heat produced in connecting the wire during the process is:

1.C1C22C1+C2V1+V22

2. C1C22(C1+C2)(V1-V2)2

3. C1C2C1+C2(V1-V2)2

4. zero

Subtopic:  Energy stored in Capacitor |
 61%
From NCERT
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In the circuit shown in figure, energy stored in 6 μF capacitor will be:
 

1. \(48 \times10^{-6}~ \mathrm J\) 2. \(32 \times10^{-6}~ \mathrm J\)
3. \(96 \times10^{-6}~ \mathrm J\) 4. \(24 \times10^{-6}~ \mathrm J\)
Subtopic:  Energy stored in Capacitor |
 64%
From NCERT
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The dimension of (1/2) ε0E2  (ε0: permittivity of free space; E: electric field) is

(1) MLT–1

(2) ML2L–2

(3) ML–1T–2

(4) ML2T–1

Subtopic:  Energy stored in Capacitor |
 74%
From NCERT
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The capacity of a condenser is 4 × 10–6 farad and its potential is 100 volts. The energy released on discharging it fully will be -

(1) 0.02 Joule

(2) 0.04 Joule

(3) 0.025 Joule

(4) 0.05 Joule

Subtopic:  Energy stored in Capacitor |
 83%
From NCERT
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The energy stored in a condenser of capacity C which has been raised to a potential V is given by -

(1) 12CV

(2) 12CV2

(3) CV

(4) 12VC

Subtopic:  Energy stored in Capacitor |
 94%
From NCERT
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The capacity of a parallel plate condenser is C. It's capacity when the separation between the plates is halved will be?

(1) 4 C

(2) 2 C

(3) C2

(4) C4

Subtopic:  Capacitance | Energy stored in Capacitor |
 88%
From NCERT
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A 6 μF capacitor is charged from 10 volts to 20 volts. Increase in energy will be 

(1) 18 × 10–4 J

(2) 9 × 10–4 J

(3) 4.5 × 10–4 J

(4) 9 × 10–6 J

Subtopic:  Energy stored in Capacitor |
 83%
From NCERT
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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 

(1) The charge on the capacitor increases

(2) The voltage across the plates decreases

(3) The capacitance increases

(4) The electrostatic energy stored in the capacitor increases

Subtopic:  Energy stored in Capacitor |
 60%
From NCERT
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A 12pF capacitor is connected to a 50V battery. How much electrostatic energy is stored in the capacitor ?

(1) 1.5 × 10–8 Joule

(2) 2.5 × 10–7 Joule

(3) 3.5 × 10–5 Joule

(4) 4.5 × 10–2 Joule

Subtopic:  Energy stored in Capacitor |
 89%
From NCERT
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