A parallel plate capacitor is charged to a certain potential and charging battery is then disconnect

English

Gujarati

Hindi

2. Electric Potential and Capacitance

medium

A parallel plate capacitor is charged to a certain potential and the charging battery is then disconnected. Now, if the plates of the capacitor are moved apart then:

The stored energy of the capacitor increases

Charge on the capacitor increases

Voltage of the capacitor decreases

The capacitance increases

Solution

When a capacitor is charged and then disconnect battery, first the capacitance will remain constant and then slowly discharge according to time constant.

The potential between the plates is $V=\frac{q d}{A \epsilon_{0}},$ so when increasing the between plate, the voltage will increase.

The energy stored in capacitor is $W=\frac{1}{2} C V^{2} .$ Thus, the electrostatic energy stored in the

capacitor also increases.

Standard 12

Physics

A battery does $200 \,J$ of work in charging a capacitor. The energy stored in the capacitor is ……… $J$

medium

A $60\; pF$ capacitor is fully charged by a $20\; \mathrm{V}$ supply. It is then disconnected from the supply and is connected to another uncharged $60 \;pF$ capactior is parallel. The electrostatic energy that is lost in this process by the time the charge is redistributed between them is (in $nJ$)

medium

(JEE MAIN-2020)

$A$ $2$ $\mu F$ capacitor is charged to a potential $=$ $10\,V$. Another $4$ $\mu F$ capacitor is charged to a potential $=$ $20\,V$. The two capacitors are then connected in a single loop, with the positive plate of one connected with negative plate of the other. What heat is evolved in the circuit?……$\mu J$

normal

Two capacitors of capacitances $C$ and $2\, C$ are charged to potential differences $V$ and $2\, V$, respectively. These are then connected in parallel in such a manner that the positive terminal of one is connected to the negative terminal of the other. The final energy of this configuration is$…..CV^2$

hard

(JEE MAIN-2020)

Find the ratio of energy stored in $5\,\mu F$ and $4\,\mu F$ capacitor in the given circuit in steady state

hard

A parallel plate capacitor is charged to a certain potential and the charging battery is then disconnected. Now, if the plates of the capacitor are moved apart then:

Solution

Similar Questions

A battery does $200 \,J$ of work in charging a capacitor. The energy stored in the capacitor is ……… $J$

Find the ratio of energy stored in $5\,\mu F$ and $4\,\mu F$ capacitor in the given circuit in steady state

Start a Free Trial Now