Electrostatics (NEET Physics): Questions 31 - 35 of 107

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Question number: 31

» Electrostatics » Coulomb's Law

MCQ▾

Question

An electron is moving round the nucleus of a hydrogen atom in a circular orbit of radius r. Calculate the Coulomb force F between proton and electron. (here k=14πϵ0)

Choices

Choice (4) Response

a.

Ke2r3r^

b.

Ke2r3r^

c.

Ke2r3r

d.

All of the above

Question number: 32

» Electrostatics » Electric Potential

MCQ▾

Question

A particle A has charge +q and a particle B has charge +4q with each of them having the same mass m. When allowed to fall from rest through the same electric potential difference, the ratio of their speed VAVB will become

Choices

Choice (4) Response

a.

1: 2

b.

4: 1

c.

2: 1

d.

1: 4

Question number: 33

» Electrostatics » Electric Potential

MCQ▾

Question

A charge (-q) and another charge (+Q) are kept at two points A and B respectively. Keeping the charge (+Q) fixed at B, the charge (-q) at A is moved to another point C such that ABC forms an equilateral triangle of side l. The net work done by electrostatic field in moving the charge (-q)

Choices

Choice (4) Response

a.

kQql

b.

Zero

c.

kQqlw

d.

kQql2

Question number: 34

» Electrostatics » Gauss's Law

MCQ▾

Question

A sphere of radius R has a uniform distribution of electric charge in its volume. At a distance x from its center, for x < R, the electric field is directly proportional to

Choices

Choice (4) Response

a.

x

b.

x 2

c.

1x

d.

1x2

Question number: 35

» Electrostatics » Electrostatic Potential Energy

MCQ▾

Question

When the separation between two charges is increased, the electric potential energy of the charges is,

Choices

Choice (4) Response

a.

decreases

b.

may increase or decrease

c.

Remains the same

d.

Increases

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