1
VITEEE 2021
MCQ (Single Correct Answer)
+1
-0

Based on the band theory of conductors, insulators and semi-conductors, the forbidden gap is smallest in

A
conductors
B
insulators
C
semi-conductors
D
All of these
2
VITEEE 2021
MCQ (Single Correct Answer)
+1
-0

The demodulator or detector circuit consists of a

A
resistor
B
transistor
C
diode
D
capacitor
3
VITEEE 2021
MCQ (Single Correct Answer)
+1
-0

The power $$(P)$$ of an engine lifting a mass of $$100 \mathrm{~kg}$$ upto a height of $$10 \mathrm{~m}$$ in $$1 \mathrm{~min}$$ is

A
P = 163.3 W
B
P = 9800 W
C
P = 10000 W
D
P = 5000 W
4
VITEEE 2021
MCQ (Single Correct Answer)
+1
-0

A silver wire of radius $$0.1 \mathrm{~cm}$$ carries a current of $$2 \mathrm{~A}$$. If the charge density in silver is $$5.86 \times 10^{28} \mathrm{~m}^{-3}$$, the drift velocity is

A
$$0.2 \times 10^{-3} \mathrm{~m} / \mathrm{s}$$
B
$$0.4 \times 10^{-4} \mathrm{~m} / \mathrm{s}$$
C
$$0.68 \times 10^{-4} \mathrm{~m} / \mathrm{s}$$
D
$$7 \times 10^{-4} \mathrm{~m} / \mathrm{s}$$
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