Electronics and Experimental Methods (CSIR (Council of Scientific & Industrial Research) Physical Sciences): Questions 37 - 40 of 50

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Passage

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

Question number: 37 (1 of 2 Based on Passage) Show Passage

» Electronics and Experimental Methods » Opto-Electronic Devices » Photo-Detectors

MCQ▾

Question

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

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 38 (2 of 2 Based on Passage) Show Passage

» Electronics and Experimental Methods » Opto-Electronic Devices » Photo-Detectors

MCQ▾

Question

If the absorption coefficient at this wavelength is Equation and if Equation power is lost on reflection at the surface, the power absorbed will be –

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 39

» Electronics and Experimental Methods » Opto-Electronic Devices » Solar Cells

Appeared in Year: 2011

MCQ▾

Question

Monochromatic light of wavelength Equation and intensity Equation falls on a solar cell of area Equation . 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 Equation , Equation and Equation ) (December)

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 40

» Electronics and Experimental Methods » Operational Amplifiers

Appeared in Year: 2011

MCQ▾

Question

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

A circuit diagram of an Op – amp

A Circuit Diagram of an Op – Amp

In figure a circuit diagram of an Op – amp is shown.

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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