Semiconductor Devices and Logic Gates · Physics · AP EAPCET

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MCQ (Single Correct Answer)

1
The semiconductor used for fabrication of visible LEDS must at least have a band gap of
AP EAPCET 2024 - 21th May Morning Shift
2
In a common emitter amplifier, AC current gains 40 and input resistance is $2 \mathrm{k} \Omega$. The load resistance is given as $10 \mathrm{k} \Omega$. Then, the voltage gain is
AP EAPCET 2024 - 21th May Morning Shift
3
The voltage gain and current gain of a transistor amplifier in common emitter configuration are respectively 150 and 50 . If the resistance in the base circuit is $850 \Omega$, then the resistance in collector circuit is
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4
If the energy gap of a substance is 5.4 eV , then the substance is
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5
A p-n junction diode is used as
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6
When a signal is applied to the input of a transistor, it was found that output signal is phase-shifted by $180^{\circ}$. The transistor configuration is
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7
If $n_r$ and $n_h$ are concentrations of electron and holes in a semiconductor, then the intrinsic carrier concentration $n_j$ in thermal equilibrium is

AP EAPCET 2024 - 18th May Morning Shift Physics - Semiconductor Devices and Logic Gates Question 7 English

AP EAPCET 2024 - 18th May Morning Shift
8
In the given digital circuit, if the inputs are $A=1 B_x$ and $C=1$, then the value of $Y_1$ and $Y_2$ are respectino
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9

Consider the statements In a semiconductor

(A) There are no free electrons at 0 K.

(B) There are no free electrons at any temperature.

(C) The number of free electrons increases with temperature.

(D) The number of free electrons is less than that in a conductor.

AP EAPCET 2022 - 4th July Evening Shift
10

Output of following logic circuit is

AP EAPCET 2022 - 4th July Morning Shift Physics - Semiconductor Devices and Logic Gates Question 10 English

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11

The truth table given below corresponds to logic gate.

AP EAPCET 2021 - 20th August Morning Shift Physics - Semiconductor Devices and Logic Gates Question 11 English

AP EAPCET 2021 - 20th August Morning Shift
12

A transistor is connected in common emitter configuration. The collector supply is $$8 \mathrm{~V}$$ and the voltage drop across a resistor of $$800 \Omega$$ in the collector circuit is $$0.5 \mathrm{~V}$$. If the current gain factor $$\alpha$$ is 0.96, then the base current is

AP EAPCET 2021 - 19th August Morning Shift
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