MEDIUM
NEET
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Which circuit will not show current in ammeter
(a)
(b)
(c)
(d)
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Important Questions on Semiconductor Electronics: Materials, Devices and Simple Circuits
EASY
NEET
IMPORTANT
In the energy band diagram of material shown in figure open circles and filled circles denotes holes and electrons respectively. The material is
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MEDIUM
NEET
IMPORTANT
A p-n photodiode is made of a material with a band gap of The minimum frequency of the radiation that can be absorbed by the material is nearly :-
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EASY
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IMPORTANT
Consider the junction diode is ideal. The value of current through the resistance of is
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EASY
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A silicon specimen is made into a -type semi-conductor by doping, on an average, one indium atom per silicon atoms. If the number density of atoms in the silicon specimen is , then the number of acceptor atoms in silicon per cubic centimetre will be
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EASY
NEET
IMPORTANT
A full wave rectifier circuit along with the input and output voltages is shown in the figure.
The contribution to output voltage from diode is,
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EASY
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In a junction the depletion layer of thickness has potential across it is . The electric field is
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EASY
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If are the lengths of the emitter, base and collector of a transistor then
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MEDIUM
NEET
IMPORTANT
A common emitter amplifier gives an output of for an input of If the current gain of the transistor is and the input resistance is , then the collector resistance is
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