Electrostatics (NEET Physics): Questions 63 - 68 of 107

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Passage

A sphere of radius R contains charge density ρ (r) = A (R-r), for 0 The total electric charge inside the sphere is Q.

Question number: 63 (1 of 4 Based on Passage) Show Passage

» Electrostatics » Gauss's Law

MCQ▾

Question

The value of A in terms of Q and R is to

Choices

Choice (4) Response

a.

3QπR4

b.

2Q2πR4

c.

3QπR

d.

Both b. and a. are correct

Question number: 64 (2 of 4 Based on Passage) Show Passage

» Electrostatics » Gauss's Law

MCQ▾

Question

The electric field inside the sphere is

Choices

Choice (4) Response

a.

12Q2πR2(13(rR)14(rR)2)

b.

12R2Q(13(rR)14(rR)2)

c.

120Q5ϵ0R2(13(rR)14(rR)2)

d.

3Qπϵ0R2(13(rR)14(rR)2)

Question number: 65 (3 of 4 Based on Passage) Show Passage

» Electrostatics » Coulomb's Law

MCQ▾

Question

If charge q is placed at r (r > R) than it would experience force is,

Choices

Choice (4) Response

a.

k q Q r

b.

kqQr2

c.

kQ2r

d.

kqQR

Question number: 66 (4 of 4 Based on Passage) Show Passage

» Electrostatics » Coulomb's Law

MCQ▾

Question

The electric field outside the sphere is (k=14πϵ0)

Choices

Choice (4) Response

a.

kQr2

b.

kQ2r2

c.

kQr

d.

kQr3

Question number: 67

» Electrostatics » Capacitors

MCQ▾

Question

All six capacitors shown are identical; each can with stand maximum 200 volts between its terminals. The maximum voltage that can be safely applied between A and B is

Six capacitor - between point A and B

Six Capacitor - Between Point a and B

Six identical capacitor are placed in figure between point A and B.

Choices

Choice (4) Response

a.

800 V

b.

200 V

c.

400V

d.

1200 V

Question number: 68

» Electrostatics » Electric Field

MCQ▾

Question

The electric intensity due to an infinite cylinder of radius R and having charge q per unit length at a distance r (r > R) from its axis is

Choices

Choice (4) Response

a.

Inversely proportional to r 2

b.

Directly proportional to r 3

c.

Directly proportional to r 2

d.

Inversely proportional to r

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