CSIR Physical Sciences: Questions 164 - 166 of 401

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

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 165

» Electromagnetic Theory » Diffraction

Appeared in Year: 2014

MCQ▾

Question

When laser light of wavelength Equation 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 Equation to – (December)

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

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 Equation . Its short circuit current density is Equation 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

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