MCQs of Electrostatic Potential and Capacitance

Electrostatic Potential and Capacitance MCQs

MCQs of Electrostatic Potential and Capacitance

Showing 1 to 10 out of 141 Questions

For a uniform electric field

\vec{E} = E_{0} (\hat{i})

, if the electric potential at x = 0 is zero, then the value of electric potential at x = +x will be _____

(a)	xE₀
(b)	-xE₀
(c)	x²E₀
(d)	-x²E₀

The line integral of an electric field along the circumference of a circle or radius r, drawn with a point charge Q at the centre will be _____

(a)	$\frac{1}{4 {πξ}_{0}} \frac{Q}{r}$
(b)	$\frac{Q}{2 ξ_{0} r}$
(c)	Zero
(d)	2πQr

A particle having mass 1 g and electric charge 10^-8C travels from a point A having electric potential 600 V to the point B having zero potential. What would be the change in its kinetic energy ?

(a)	-6 x 10^-6 erg
(b)	-6 x 10^-6 J
(c)	6 x 10^-6 J
(d)	6 x 10^-6 erg

A particle having mass m and charge q is at rest. On applying a uniform electric field E on it, it starts moving. What is its kinetic energy when it travels a distance y in the direction of force ?

(a)	qE²y
(b)	qEy²
(c)	qEy
(d)	q²Ey

The electric potential of 5 V is on the surface of hollow metal sphere of radius 3 cm. What will be electric potential at the centre of sphere ?

(a)	0 V
(b)	3 V
(c)	5 V
(d)	10 V

A moving electron approaches another electron. What would be the charge in the potential energy of this system ?

(a)	Remains constant
(b)	Increases
(c)	Decreases
(d)	May increase or decrease

Energy of charged capacitor is U. Now it is removed from a battery and then is connected to another identical uncharged capacitor in parallel. What will be the energy of each capacitor now ?

(a)	$\frac{3 U}{2}$
(b)	U
(c)	$\frac{U}{4}$
(d)	$\frac{U}{2}$

A uniform electric field is prevailing in Y-direction in a certain region. The co-ordinates of points A, B and C are (0, 0), (2, 0) and (0, 2) respectively. Which of the following alternatives is true for the potential of these points ?

(a)	V_A = V_B, V_A > V_C
(b)	V_A > V_B, V_A = V_C
(c)	V_A < V_C, V_B = V_C
(d)	V_A = V_B, V_A < V_C

The capacitance of a parallel plate capacitor formed by the circular plates of diameter 4.0 cm is equal to the capacitance of a sphere of diameter 200 cm. Find the distance between two plates.

(a)	2 x 10^-4 m
(b)	1 x 10^-4
(c)	3 x 10^-4
(d)	4 x 10^-4

10.

The capacitance of a variable capacitor joined with a battery of 100 V is changed from 2μF to 10μF. What is the change in the energy stored in it?

(a)	2 x 10^-2 J
(b)	2.5 x 10^-2 J
(c)	6.5 x 10^-2 J
(d)	4 x 10^-2 J

Showing 1 to 10 out of 141 Questions