Electronics and Experimental Methods (CSIR Physical Sciences): Questions 23 - 25 of 44

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Question number: 23

» 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

Question number: 24

» Electronics and Experimental Methods » A-D and D-a Converters

Appeared in Year: 2011

MCQ▾

Question

A signal of frequency 10 kHz is being digitized by Equation converter. A possible sampling time which can be use is – (June)

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 25

» Electronics and Experimental Methods » Device Characteristics

Appeared in Year: 2011

MCQ▾

Question

A battery powers two circuits Equation and Equation as shown in the figure,

A battery powers two circuits

A Battery Powers Two Circuits

In figure a battery powers two circuits shown.

The total current Equation drawn from the battery is estimated by measuring the currents Equation and Equation through the individual circuits. If Equation and Equation are both 200 mA and if the errors in their measurement are 3 mA and 4 mA respectively, the error in the estimate of Equation is –

(December)

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

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