MCQs of Electrostatic Potential and Capacitance

Electrostatic Potential and Capacitance MCQs

MCQs of Electrostatic Potential and Capacitance

Showing 121 to 130 out of 141 Questions

121.

In case of electric field and electric potential, _____ .

(a)	both are vector quantities
(b)	none is a vector quantity
(c)	only electric field is vector quantity
(d)	only electric potential is vector quantity

122.

In an electric field, the work required to be done against the electric field to carry a 5.0 C charge from a point A to point B is 20 J. If the potential of point A is 10 V, then what is the potential of point B ?

(a)	zero
(b)	6 V
(c)	14 V
(d)	2.5 V

123.

A total charge of 1.11 x 10^-10 C is distributed non-uniformly over the circumference of a ring of radius 0.5 m. What is the value of the line integral

\int_{l = \infty}^{l = 0} - \vec{E} . \vec{d l}

in volt ? (l = 0 is the centre of ring) (k = 9 x 10⁹ SI unit)

(a)	+2
(b)	-1
(c)	-2
(d)	zero

124.

Equal charges are given to two conducting spheres of different radii. Hence _____ .

(a)	potential on the larger sphere is more
(b)	potential on the smaller sphere is more
(c)	potential is equal on both the spheres
(d)	potential on which one is more depend on their material

125.

On which of the following does the capacitance of a parallel plate capacitor, not depend ?

(a)	Area of plate
(b)	Medium between plates
(c)	Metal of the plate
(d)	Distance between the plates

126.

Electric susceptibility χ_e = _____ .

(a)	$\frac{ε_{0} P}{E}$
(b)	$\frac{ε_{0} E}{P}$
(c)	$\frac{E}{ε_{0} P}$
(d)	$\frac{P}{ε_{0} E}$

127.

The capacitance of an isolated conducting sphere is directly proportional to _____ .

(a)	R
(b)	R²
(c)	$\frac{1}{R}$
(d)	$\frac{1}{R^{2}}$

128.

What is the value of the dielectric constant for the metals ?

(a)	zero
(b)	1
(c)	may be greater or less than 1
(d)	infinite

129.

A capacitor of 2 μF capacitance is charged upto a potential of 200 V. Now, if its two plates are connected with a conducting wire, then how much heat energy will be produced ?

(a)	4 x 10⁴ J
(b)	4 x 10¹⁰ J
(c)	4 x 10^-2 J
(d)	2 x 10^-2 J

130.

Two capacitors of capacitances C₁ and C₂ are joined in parallel and a battery is joined with them. If the charges on C₁ and C₂ are q₁ and q₂, then

\frac{q_{1}}{q_{2}}

= _____ .

(a)	$\frac{C_{1}}{C_{2}}$
(b)	$\frac{C_{2}}{C_{1}}$
(c)	$\frac{C_{1}^{2}}{C_{2}^{2}}$
(d)	$\frac{C_{2}^{2}}{C_{1}^{2}}$

Showing 121 to 130 out of 141 Questions