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CBSE

NEET Physics : Electrostatic Potential and Capacitance

Multiple Choice Questions

81.

Assertion: A charge, whether stationary or in motion produces a magnetic field around it.

Reason: Moving charges produce only electric field in the surrounding space.

If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false

82.

What is the energy stored in the capacitor between terminals a and b of the network shown in the figure? ( capacitance of each capacitor C = 1 μF)

12.5 μJ
Zero
25 μJ
50 μJ

83.

An uncharged particle is moving with a velocity $\vec{v}$ in non-uniform magnetic field as shown.

velocity $\vec{v}$ would be

Maximum at A & B
Minimum at A & B
Maximum at M
same at all points

84.

Energy stored in between the plates of parallel plate capacitor of area A, separated by distance d is

$\frac{1}{2}$ ε₀ E² Ad
$\frac{1}{2}$ ε₀ E² $\frac{A}{d}$
$\frac{1}{2}$ ε₀ $\frac{d}{E^{2} A}$
$\frac{1}{2} \frac{A d}{ε_{0} E^{2}}$

85.

An electric charge 10^-3 μC is placed at the origin (0,0) of (x-y) co-ordinate system. Two points A and B are situated at $(\sqrt{2}, \sqrt{2})$ and (2,0) respectively. The potential difference between the points A and B will be

4.5 volt
9 volt
Zero
2 volt

86.

What would be the voltage across C₃?

$\frac{(C_{1} + C_{2}) V}{C_{1} + C_{2} + C_{3}}$
$\frac{C_{1} V}{C_{1} + C_{2} + C_{3}}$
$\frac{C_{2} V}{C_{2} + C_{2} + C_{3}}$
$\frac{C_{3} V}{C_{1} + C_{2} + C_{3}}$

87.

Assertion: Electric potential of earth is taken zero.

Reason: No electric field exists on earth surface.

If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false

88.

A conducting sphere of radius R carrying charge Q lies inside an uncharged conducting shell of raius 2R. If they are joined by a metal wire, the amount of heat that will be produced is

$\frac{1}{4 {πε}_{0}} \frac{Q^{2}}{4 R}$
$\frac{1}{4 {πε}_{0}} \frac{Q^{2}}{2 R}$
$\frac{1}{4 {πε}_{0}} \frac{Q^{2}}{R}$
$\frac{2}{4 {πε}_{0}} \frac{Q^{2}}{3 R}$

89.

Assertion: A electrostatic field line never form closed loop.

Reason: Electrostatic field is conservative field.

If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.

90.

The minimum magnetic dipole moment of electron in hydrogen atom is

$\frac{eh}{2 πm}$
$\frac{eh}{4 πm}$
$\frac{eh}{πm}$
0

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NEET Physics : Electrostatic Potential and Capacitance

Multiple Choice Questions