MCQ
Work done by an external agent in separating the parallel plate capacitor is
  • A
    $CV$
  • B
    $\frac{1}{2}{C^2}V$
  • $\frac{1}{2}C{V^2}$
  • D
    None of these

Answer

Correct option: C.
$\frac{1}{2}C{V^2}$
c
(c)

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Pressure at the bottom of a tank of water is $3P$, where $P$ is atmospheric pressure. If water is drawn out till the level of water is lowered by one fifth, then the pressure at the bottom of the tank is
The density of the atmosphere is $1.29\, kg/m^3$, then how high would the atmosphere extend ? $(g = 9.81\, m/sec^2)$ ........ $km$
Calorie is defined as the amount of heat required to raise temperature of $1g$ of water by $1°C$ and it is defined under which of the following conditions
A barometer kept in an elevator reads $76 \,cm$ when the elevator is accelerating upwards. The most likely pressure inside the elevator (in $cm$ of $Hg$ ) is ........
Stars are not visible in the day time because
The circuit shown in following figure contains two diode $D_1$ and $D_2$ each with a forward resistance of $50$ ohms and with infinite backward resistance. If the battery voltage is $6 V$, the current through the $100$ ohm resistance (in amperes) is
The potential difference across the $100\,\Omega$ resistance in the following circuit is measured by a voltmeter of $900 \,\Omega$ resistance. The percentage error made in reading the potential difference is
When the light of frequency $2v_0$ (where $v_0$ is threshold frequency), is incident on a metal plate , the maximum velocity of electrons emitted is $v_1$. When the frequency of the incident radiation is increased to $5v_0,$ the maximum velocity of electrons emitted from the same plate is $v_2$. The ratio of $v_1$ to $v_2$ is
The de-Broglie wavelength $\lambda$
Due to which property of water, tiny particles of camphor dance on the surface of water