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 Evening Shift
MCQ (Single Correct Answer)
+1
-0

A carrier wave is used to transmit a message signal. If the peak voltage of modulating signal and carrier signal are increased by $$1 \%$$ and $$3 \%$$ respectively, the modulation index is changed by

A
$$-2\%$$
B
$$4\%$$
C
$$2\%$$
D
$$-4\%$$
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