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NEET UG PHYSICS MCQ: SEMI CONDUCTOR DEVICES

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Analyzing +4 | -1

Statement I: In a common-emitter transistor amplifier the input current is much less than output current.

Statement II: The common-emitter transistor amplifier has very high input impedance.

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Correct option: C

Statement I is true; Statement II is false

Option C (Statement I is true; Statement II is false) is correct because in a common-emitter amplifier, the output current is much larger than the input current, but the input impedance is not very high.

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Following is the relation between current and charge

I = A{T^2}{e^{q/{V_L}}}

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\sqrt{n}.

n

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A    0   0   1   1
B    0   1   0   1
Y    1   0   0   1  The average value of output direct current in a half wave rectifier is A

p - n\;

junction has acceptor impurity concentration of

{10^{17}}\mathrm{c}{\mathrm{m}^{ - 3}}

P

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{10^{16}}

\mathrm{c}{\mathrm{m}^{ - 3}}

N

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\mathrm{c}{\mathrm{m}^{ - 3}}