Electronics and Experimental Methods (CSIR (Council of Scientific & Industrial Research) Physical Sciences): Questions 23 - 26 of 50

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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 . 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: 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 converter. A possible sampling time which can be use is – (June)

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 25

» Electronics and Experimental Methods » Device Characteristics

Appeared in Year: 2011

MCQ▾

Question

A battery powers two circuits and 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 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.

Question number: 26

» Electronics and Experimental Methods » Digital Techniques and Applications » Similar Circuits

Appeared in Year: 2011

MCQ▾

Question

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

Circuit consists of AND, OR and XOR gates

Circuit Consists of and, or and XOR Gates

In figure circuit of combination of AND, OR and XOR gates is shown.

Truth table of given figure

In table inputs of given figure are given.

A

B

Z

0

0

0

1

1

0

1

1

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

Choices

Choice (4) Response

a.

1011

b.

1111

c.

0100

d.

1010

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