The diagrams below show regions of equipotential. A positive charge is moved from A to B in each diagram.

In all the four cases the work done is the same.

Maximum work is required to move q in figure (c).

Minimum work is required to move q in figure (a).

Maximum work is required to move q in figure (b).

For a polar molecule, which of the following statements is true?

The centre of gravity of electrons and protons do not coincide

The centre of gravity of electrons and protons coincide

The charge distribution is always symmetrical

The dipole moment is always zero

The diagrams below show regions of equipotential. A positive charge is moved from A to B in each diagram.

In all the four cases the work done is the same.

Maximum work is required to move q in figure (c).

Minimum work is required to move q in figure (a).

Maximum work is required to move q in figure (b).

E M B I B E

Achieve CUET (UG) Physics Practice Book>Chapter 2 - Electrostatic Potential and Capacitance>Exercise>Q 50

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Statement I When two charged spheres are connected to each other by a thin conducting wire, charge flows from the bigger sphere to the smaller sphere if initial charges on them are same.

Statement II Electrostatic energy will be lost in redistribution.

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Important Questions on Electrostatic Potential and Capacitance

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Achieve CUET (UG) Physics Practice Book>Chapter 2 - Electrostatic Potential and Capacitance>Exercise>Q 51

The diagrams below show regions of equipotential.

Question Image

A positive charge is moved from $A$ to $B$ in each diagram.

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Achieve CUET (UG) Physics Practice Book>Chapter 2 - Electrostatic Potential and Capacitance>Exercise>Q 52

Three charges $Q_{0}$ , $- q$ and $- q$ are placed at the vertices of an isosceles right angle triangle as in the figure. The net electrostatic potential energy is zero if $Q_{0}$ is equal to

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Achieve CUET (UG) Physics Practice Book>Chapter 2 - Electrostatic Potential and Capacitance>Exercise>Q 53

Identify the wrong statement.

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Achieve CUET (UG) Physics Practice Book>Chapter 2 - Electrostatic Potential and Capacitance>Exercise>Q 54

Two positive point charges of 12

μ C a n d 5 μ C

are placed

10 cm

apart in air. The work needed to bring them

4 cm

closer is

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Achieve CUET (UG) Physics Practice Book>Chapter 2 - Electrostatic Potential and Capacitance>Exercise>Q 55

Which of the following diagram is correct?

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Achieve CUET (UG) Physics Practice Book>Chapter 2 - Electrostatic Potential and Capacitance>Exercise>Q 56

Assertion: For practical purposes, the Earth is used as a reference at zero potential in electrical circuits.
Reason: The electrical potential of a sphere of radius

R

with charge

Q

uniformly distributed on the surface is given by

\frac{Q}{4 π ε_{0} R}

.

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Achieve CUET (UG) Physics Practice Book>Chapter 2 - Electrostatic Potential and Capacitance>Exercise>Q 57

Assertion: Across the surface of a charged conductor potential is discontinuous.

Reason: Electrostatic force is a conservative force.

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Achieve CUET (UG) Physics Practice Book>Chapter 2 - Electrostatic Potential and Capacitance>Exercise>Q 58

Assertion: In any condition when a conducting sphere is charged then the charge on it must be distributed uniformly over it surface because it is a sphere

Reason: The surface of a conducting body is an equipotential surface.