Answer the following.
Intrinsic semiconductor.
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Semiconductor Electronics: Materials, Devices and Simple Circuits - ISC Class 12 Physics Questions with Answers, Page 2
31 past-paper questions on Semiconductor Electronics: Materials, Devices and Simple Circuits from ISC Class 12 Physics papers (2027-2019), newest first, in full. Questions 21-31 are on this page, 20 to a page. Tap "Show answer" under a question to see its answer.
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Answer the following.
State how a p-type semiconductor will be obtained from a pure crystal of a semiconductor.
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Answer the following.
Extrinsic semiconductor.
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Answer the following.
What is the advantage of an LED bulb over the filament electric bulb?
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Answer the following.
Give a relation between $\alpha$ and $\beta$ for a transistor.
(Derivation is not required.)
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Answer the following.
State any one difference between energy band diagram of conductors and that of insulators.
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Draw the following.
(i)[3.0]
Draw a neat circuit diagram to study the input and output characteristics of a common emitter transistor.
Draw: Circuit diagram to study input and output characteristics of a common emitter transistor
Must show: n-p-n or p-n-p transistor in common emitter configuration, Base-emitter circuit with input bias battery, rheostat, microammeter, voltmeter, Collector-emitter circuit with output battery, rheostat, milliammeter, voltmeter
(ii)[2.0]
Draw the symbol for AND gate and write its truth table.
Draw: Logic symbol for AND gate and truth table
Must show: Two inputs, AND gate symbol, One output, Truth table
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Draw the following.
(i)[3.0]
Draw a labelled circuit diagram of a half wave rectifier and give its output waveform.
Draw: Circuit diagram of a half wave rectifier and output waveform
Must show: AC supply / transformer secondary, p-n junction diode, Load resistor RL, Input waveform, Output rectified waveform
(ii)[2.0]
Draw a symbol for NOR gate and write its truth table.
Draw: Logic symbol for NOR gate and truth table
Must show: Two inputs, NOR gate symbol with bubble at output, One output, Truth table
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Answer the following.
What is meant by doping?
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Answer the following.
What is the change in the resistance of the semi-conductor with increase in temperature?
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Answer the following.
Name the majority charge carriers in n-type semi-conductor.
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