Home
Class 12
PHYSICS
A capacitor is used to store 24 watt hou...

A capacitor is used to store 24 watt hour of enegy at 1200 volt. What should be the capacitance of the capacitor?

A

120 mF

B

`120 muF`

C

`24 muF`

D

`24 mF`

Text Solution

Verified by Experts

The correct Answer is:
A

`U=24 xx60 xx60J , V = 1200`
`U=1/2 CV^2implies 24 xx60 xx60 =1/2 xxCxx144 xx10^4`
`impliesC =120 mF`
Promotional Banner

Similar Questions

Explore conceptually related problems

Capacitance of a capacitor.

What is capacitance of the capacitor shown in figure?

A potential difference of 20 volts develops between the plates of the capacitor when 2xx10^(12) electrons are transferred from one plate of the capacitor to the other. What should be the capacitance of capacitor?

Two identical capacitors are connected as shown in fignre. A dielectric slab is introduced between the plates of one of the capacitors so as to fill the gap, the battery remaining connected. What will be the capacitance, the charge, potential difference and stored energy for each capacitor?

A 10 muF capacitor is charged to a potential difference of 50 V and is connected to another uncharged capacitor in parallel. Now the common potential difference becomes 20 volt. The capacitance of second capacitor is

A capacitor charged from a 50 V d.c. supply is found to have charge of 10 muC . What is the capacitance of the capacitor and how much energy is stored in it?

The capacitance of a charged capacitor is C and the energy stored in it is U. What is the value of charge on the capacitor?

In parallel arrangement of capacitor, i. the p.d across individual capacitor is same. ii. The charge is shared by the capacitor in the ratio of the capacitance. iii. The resultant capacitance is equal to sum of the capacitance of capacitors used.

A capacitor of capacitance 5 muF is charged to a potential difference of 10 volts and another capacitor of capacitance 9 muF is charged to a potential difference of 8 volts. Now these two capacitors are connected in such a manner that the positive plate of one is connected to the positive plate of other. Calculate the common potential difference across the two capacitors.