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1
AP EAPCET 2022 - 4th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

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.

A
B, C, D are true but A is false.
B
A, B, C are true but D is false.
C
A, C, D are true but B is false.
D
A, B, C and D are all true.
2
AP EAPCET 2022 - 4th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

Output of following logic circuit is

AP EAPCET 2022 - 4th July Morning Shift Physics - Semiconductor Devices and Logic Gates Question 18 English

A
$$(\bar{A}+B)+(\bar{A}+\bar{C})+(B+\bar{C})$$
B
$$(A+\bar{B}) \cdot(A+C) \cdot(\bar{B}+\bar{C})$$
C
$$(\bar{A}+B) \cdot(\bar{A}+\bar{C}) \cdot(B+\bar{C})$$
D
$$(\bar{A}+B)-(\bar{A}+\bar{C})-(B+\bar{C})$$
3
AP EAPCET 2021 - 20th August Morning Shift
MCQ (Single Correct Answer)
+1
-0

The truth table given below corresponds to logic gate.

AP EAPCET 2021 - 20th August Morning Shift Physics - Semiconductor Devices and Logic Gates Question 19 English

A
NAND
B
OR
C
AND
D
XOR
4
AP EAPCET 2021 - 19th August Morning Shift
MCQ (Single Correct Answer)
+1
-0

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

A
$$2.6 \times 10^{-5} \mathrm{~A}$$
B
$$3.6 \times 10^{-5} \mathrm{~A}$$
C
$$5.6 \times 10^{-5} \mathrm{~A}$$
D
$$6.6 \times 10^{-5} \mathrm{~A}$$
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