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

The fine powder of a coloured glass is seen as
A coil having an area ${A_0}$ is placed in a magnetic field which changes from ${B_0}$ to $4{B_0}$ in a time interval $t$. The $e.m.f$. induced in the coil will be
The SI unit of magnetic flux is:
In hydrogen atom, if transition of electron from third orbit to second orbit, then wavelength of emitted radiation will be :
A compass needle is placed in the gap of a parallel plate capacitor. The capacitor is connected to a battery through a resistance. The compass needle:
The power of a person's spectacle lenses is +2 D . He is suffering from which of the following defects?
Consider the following statements in case of Young's double slit experiment 
$(1)$ A slit is necessary if we use an ordinary extended source of light
$(2)$ A slit is not necessary if we use an ordinary but well collimated beam of light
$(3)$ A slit is not needed if we use a spatially coherent point source of light
Which of the above statements is true ?
The figure shows a network of four resistances and three batteries Choose the correct alternative
Assertion : The positive charge particle is placed in front of a spherical uncharged conductor. The number of lines of forces terminating on the sphere will be more than those emerging from it.

Reason : The surface charge density at a point on the sphere nearest to the point charge will be negative and maximum in magnitude compared to other points on the sphere

A slit of width $a$ is illuminated by white light. For red light ($\lambda = 6500 \;\mathring A$), the first minima is obtained at $\theta = {30^o}$. Then the value of $a$ will be