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. |
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. |
Question 40
Appeared in Year: 2011
Question MCQ▾
A time varying signal is fed to an Op – Amp circuit with output signal as 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 |
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.
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. | ||
b. | ||
c. | ||
d. |