Electronics and Experimental Methods [CSIR (Council of Scientific & Industrial Research) Physical Sciences]: Questions 38 - 41 of 70

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Passage

Light of wavelength 660 nm and power of is incident on a semiconductor photodiode with an absorbing layer of thickness of .

Question 38 (2 of 2 Based on Passage)

Question MCQ▾

The generated photo – current for a quantum efficiency of unity will be –

Choices

Choice (4)Response

a.

b.

c.

d.

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Question 39

Appeared in Year: 2011

Question MCQ▾

Monochromatic light of wavelength and intensity falls on a solar cell of area . The conversion efficiency of the solar cell is 10% . If each converted photon results in an electron – hole pair, what is the maximum circuit current supplied by the solar cell?

(Take , and ) (December)

Choices

Choice (4)Response

a.

b.

c.

d.

Edit

Question 40

Appeared in Year: 2011

Question MCQ▾

A time varying signal is fed to an Op – Amp circuit with output signal as shown

A Circuit Diagram of an Op – Amp

The circuit implements a (June)

Choices

Choice (4)Response

a.

Low pass filter with cutoff frequency 16 Hz

b.

Low pass filter with cutoff frequency 100 Hz

c.

High pass filter with cutoff frequency 16 Hz

d.

High pass filter with cutoff frequency 100 Hz

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Question 41

Appeared in Year: 2011

Question MCQ▾

The figure below shows a voltage regulator utilizing a Zener diode of breakdown voltage 5V and a positive triangular wave input of amplitude 10V.

A Circuit for a Voltage Regulator
Graph of Input Voltage Verses Time

For , the Zener regulates the output voltage by channeling the excess current through itself. Which of the following waveforms shows the current passing through the Zener diode? (December)

Choices

Choice (4)Response

a.

Current Passing through Zener Diode: Choice A

b.

Current Passing through Zener Diode: Choice B

c.

Current Passing through Zener Diode: Choice C

d.

Current Passing through Zener Diode: Choice D

Edit