MHT CET 2021 22th September Evening Shift | Semiconductor Devices and Logic Gates Question 99 | Physics

For a common-emitter amplifier, the voltage gain is 40. Its input and output impedances are $$100 \Omega$$ and $$400 \Omega$$, respectively. The power gain of the CE amplifier will be

450

400

300

500

MHT CET 2021 22th September Evening Shift

MCQ (Single Correct Answer)

-0

Choose the correct statement. In semiconductors valance band and conduction band

is separated by large energy gap.

is separated by small energy gap:

is almost empty.

overlap each other.

MHT CET 2021 22th September Morning Shift

MCQ (Single Correct Answer)

-0

A logic gate which gives output 'HIGH' only when its two input terminals are at different logic levels with respect to each other is

NOR gate

OR gate

AND gate

X-OR gate

MHT CET 2021 22th September Morning Shift

MCQ (Single Correct Answer)

-0

Choose the FALSE statement from the following.

Generally, in conductors the valence and conducting bands overlap.

The resistivity of a semiconductor increases with increase in temperature

The conductivity of a semiconductor increase with increase in temperature

Substances with energy gap of the order of $$10 \mathrm{~eV}$$ are insulators

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