Electromagnetic Theory (CSIR Physical Sciences): Questions 28 - 30 of 57

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Question number: 28

» Electromagnetic Theory » Radiation- From Moving Charges

Appeared in Year: 2014

MCQ▾

Question

A non – relativistic particle of mass m and charge e, moving with a velocity v and acceleration a , emits radiation of intensity I . What is the intensity of the radiation emitted by a particle of mass m2, charge 2e , velocity v2 and acceleration 2a ? (December)

Choices

Choice (4) Response

a.

8I

b.

2I

c.

16I

d.

4I

Question number: 29

» Electromagnetic Theory » Diffraction

Appeared in Year: 2014

MCQ▾

Question

When laser light of wavelength λ falls on a metal scale with 1 mm engravings at a grazing angle of incidence, it is diffracted to from a vertical chain of diffraction sports on a screen kept perpendicular to the scale. If the wavelength of the laser is increase by 200 nm, the angle of the first – order diffraction spot changes from 50 to – (December)

Choices

Choice (4) Response

a.

5.140

b.

5.210

c.

5.0180

d.

6.600

Question number: 30

» Electromagnetic Theory » Laplace and Poisson Equations

Appeared in Year: 2011

MCQ▾

Question

The electrostatic potential V(x,y) in free space in a region where the charge density ρ is zero is given by V(x,y)=4e2x+f(x)3y2 . Given that the x – component of the electric field, Ex and V are zero at the origin, f(x) is – (June)

Choices

Choice (4) Response

a.

4e2x8

b.

3x24e2x

c.

3x24e2x+16x

d.

3x24e2x+8x

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