Electronics and Experimental Methods (CSIR Physical Sciences): Questions 23 - 26 of 41

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 389 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 250.00 or

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 100mWcm2 . Its short circuit current density is 30mAcm2 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 AD converter. A possible sampling time which can be use is – (June)

Choices

Choice (4) Response

a.

100μs

b.

40μs

c.

200μs

d.

50μs

Question number: 25

» Electronics and Experimental Methods » Device Characteristics

Appeared in Year: 2011

MCQ▾

Question

A battery powers two circuits C1 and C2 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 I drawn from the battery is estimated by measuring the currents I1 and I2 through the individual circuits. If I1 and I2 are both 200 mA and if the errors in their measurement are 3 mA and 4 mA respectively, the error in the estimate of I is –

(December)

Choices

Choice (4) Response

a.

7.0mA

b.

5.0mA

c.

10.5mA

d.

7.5mA

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 figure are given.

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

Sign In