MCQs of Electrostatic Potential and Capacitance

Electrostatic Potential and Capacitance MCQs

MCQs of Electrostatic Potential and Capacitance

Showing 31 to 40 out of 141 Questions

31.

An alpha particle is accelerated through a potential difference 10⁶ volt. Its kinetic energy will be _____

(a)	1 MeV
(b)	2 MeV
(c)	4 MeV
(d)	8 MeV

32.

To increase the charge on plates of capacitor means _____

(a)	to increase the capacitance
(b)	to increase the potential difference between two plates
(c)	to increase both in option (A) and (B)
(d)	none of these options

33.

There are 10 capacitors, each of capacitance 10μF. The ratio of maximum to minimum capacitance obtained by their combination is _____ .

(a)	5 : 1
(b)	10 : 1
(c)	50 : 1
(d)	100 : 1

34.

Capacitance of spherical capacitor is 1μF, so its diameter = _____ m.

[\frac{1}{4 {πξ}_{0}} = 9 \times 10^{9} SI]

(a)	1.8
(b)	18
(c)	1.8 x 10³
(d)	1.8 x 10⁴

35.

Charge and mass of an electron are e and m respectively. Now from stationary position, potential difference V is applied and it is accelerated. So, what will be its final velocity ?

(a)	$\sqrt{\frac{2 e V}{m}}$
(b)	$\sqrt{\frac{e V}{m}}$
(c)	$\frac{e V}{m}$
(d)	$\frac{e V}{2 m}$

36.

A capacitor of capacitance 20μF charged up to 10kV, the charge Q on its plate will be _____ .

(a)	200
(b)	2000
(c)	0.2
(d)	2

37.

27 small drops of water having same charge and same radius are combined to form one big drop. The ratio of capacitance of one big drop to small drop is _____

(a)	2 : 1
(b)	3 : 1
(c)	1 : 3
(d)	1 : 2

38.

The dielectric strength of air is nearly _____ .

(a)	$3000 \frac{V}{mm}$
(b)	$3000 \frac{V}{cm}$
(c)	$30000 \frac{V}{cm}$
(d)	$3000 \frac{V}{m}$

39.

Which of the following does not represent energy of charged capacitor ?

(a)	$\frac{1}{2} {CV}^{2}$
(b)	$\frac{1}{2} {QV}^{2}$
(c)	$\frac{1}{2} QV$
(d)	$\frac{Q^{2}}{2 C}$

40.

Dimensional formula of an electric potential is _____

(a)	M¹ L² T³ A^-1
(b)	M¹ L² T^-3 A^-1
(c)	M¹ L² T^-3 A¹
(d)	M¹ L² T³ A¹

Showing 31 to 40 out of 141 Questions