Electronics and Experimental Methods [CSIR (Council of Scientific & Industrial Research) Physical Sciences]: Questions 23 - 26 of 70

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Question 23

Appeared in Year: 2014

Question MCQ▾

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.

21.0 to 10.5

d.

42.0 to 26.2

Edit

Question 24

Appeared in Year: 2011

Question MCQ▾

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

Choices

Choice (4)Response

a.

b.

c.

d.

Edit

Question 25

Appeared in Year: 2011

Question MCQ▾

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

A Battery Powers Two Circuits

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

(December)

Choices

Choice (4)Response

a.

b.

c.

d.

Edit

Question 26

Appeared in Year: 2011

Question MCQ▾

Consider the digital circuit shown below in which the input C is always high (1) .

Circuit Consists of and, or and XOR Gates
In Table Inputs of Figure Are Given
ABZ
00
01
10
11

The entries in the Z column (vertically) are, - (June)

Choices

Choice (4)Response

a.

1010

b.

1111

c.

1011

d.

0100

Edit