Electromagnetic Theory (CSIR Physical Sciences): Questions 8 - 10 of 57

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Question number: 8

» Electromagnetic Theory » Electromagnetic Waves in Free Space

Appeared in Year: 2014

MCQ▾

Question

A light source is switched on and off at a constant frequency f . An observer moving with a velocity u with respect to the light source will observe the frequency of the switching to be – (June)

Choices

Choice (4) Response

a.

f(1u2c2)

b.

f(1u2c2)12

c.

f(1u2c2)1

d.

f(1u2c2)12

Question number: 9

» Electromagnetic Theory » Gauss Law and Applications

Appeared in Year: 2012

MCQ▾

Question

Consider a hallow charged shell of inner radius a and outer radius b . The volume charge density is ρ(r)=kr2 (k is a constant) in the region a<r<b . The magnitude of the electric field produced at distance r>a is –

Choices

Choice (4) Response

a.

k(ba)ε0r2 for all r>a

b.

k(ra)ε0r2 for a<r<b and k(ba)ε0r2 for r>b

c.

k(ba)ε0r2 for a<r<b and kbε0r2 for r>b

d.

k(ra)ε0a2 for a<r<b and k(ba)ε0a2 for r>b

Question number: 10

» Electromagnetic Theory » Magnetostatics » Ampere's Theorem

Appeared in Year: 2012

MCQ▾

Question

The magnetic field at a distance R from a long straight wire carrying a steady current I is proportional to – (June)

Choices

Choice (4) Response

a.

IR

b.

I2R2

c.

IR

d.

IR2

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