MCQs of Electrostatic Potential and Capacitance

Electrostatic Potential and Capacitance MCQs

MCQs of Electrostatic Potential and Capacitance

Showing 71 to 80 out of 141 Questions

71.

A 2 μF capacitor is charged up to 1000 V. The plates of the capacitor are then connected with a conducting wire. How much heat will be generated in the above situation ?

(a)	1 J
(b)	0.1 J
(c)	0.01 J
(d)	0.001 J

72.

Two capacitor of 1 μF and 2 μF are connected in series and this combination is charged upto a potential difference of 120 volt. What will be the potential difference across 1 μF capacitor ?

(a)	40 volt
(b)	60 volt
(c)	80 volt
(d)	120 volt

73.

An external agency carries -6 C of charge from infinity to a point in an electrostatic field and performs 120 Joules of work. The potential at the given point is _____ .

(a)	10 V
(b)	-10 V
(c)	20 V
(d)	-20 V

74.

On moving a charge of 20 C by 2 cm. 2 J of work is done, then the potential difference between the points is _____ .

(a)	8 V
(b)	2 V
(c)	0.1 V
(d)	0.5 V

75.

Three capacitors, each of capacity 4 μF, are to be connected in such a way that the effective capacitance is 6 μF. This can be done by _____ .

(a)	connecting all of them in series
(b)	connecting all of them in parallel
(c)	connecting two in series and one in parallel
(d)	connecting two in parallel and one in series

76.

In a charged capacitor, energy is stored in _____ .

(a)	the electric field between the two plates
(b)	the edges of the two capacitor plates
(c)	positive charges
(d)	both in positive and negative charges

77.

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)	$x E_{0}$
(b)	$- x E_{0}$
(c)	$x^{2} E_{0}$
(d)	$- x^{2} E_{0}$

78.

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

(a)	$\frac{1}{4 {πε}_{0}} \frac{Q}{r}$
(b)	$\frac{Q}{2 ε_{0} r}$
(c)	zero
(d)	$2 πQr$

79.

A particle having mass 1 g and electric charge 10^-8 C 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 × 10^-6 erg
(b)	-6 × 10^-6 J
(c)	6 × 10^-6 J
(d)	6 × 10^-6 erg

80.

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

Showing 71 to 80 out of 141 Questions