CSIR (Council of Scientific & Industrial Research) Physical Sciences: Questions 164 - 167 of 463

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Question number: 164

» Electromagnetic Theory » Radiation- From Moving Charges

Appeared in Year: 2014

MCQ▾

Question

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

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 165

» Electromagnetic Theory » Diffraction

Appeared in Year: 2014

MCQ▾

Question

When laser light of wavelength 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 to – (December)

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 166

» Electronics and Experimental Methods » Opto-Electronic Devices » Solar Cells

Appeared in Year: 2014

MCQ▾

Question

The power of density of sunlight incident on a solar cell is . Its short circuit current density is and the open circuit voltage is 0.7 V. If the fill factor of the solar cell decreases from 0.8 to 0.5, then the percentage efficiency will decrease from (December)

Choices

Choice (4) Response

a.

16.8 to 10.5

b.

24.0 to 16.8

c.

42.0 to 26.2

d.

21.0 to 10.5

Question number: 167

» Electromagnetic Theory » Laplace and Poisson Equations

Appeared in Year: 2011

MCQ▾

Question

The electrostatic potential in free space in a region where the charge density is zero is given by. Given that the – component of the electric field, and V are zero at the origin, is – (June)

Choices

Choice (4) Response

a.

b.

c.

d.

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