NEET UG PHYSICS MCQ: SEMI CONDUCTOR DEVICES

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Application +4 | -1

In a silicon transistor, the base current is changed by

20\mu A

. This results in a change of 2 mA in the collector current. If the input resistance and load resistance of an amplifier are

1k\Omega

and

5k\Omega

respectively, what is the trans conductance of the transistor in SI units?

View answer and explanation

Correct option: B

0.1

Option B (0.1) is correct because transconductance is the change in collector current divided by the change in base current.

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

{V_L}

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

P

{10^{16}}

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

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kT =

{n_i} = 1.4 \times {10^{10}}

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