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NCATT EXAM 2025 QUESTIONS AND ANSWERS

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NCATT EXAM 2025 QUESTIONS AND ANSWERS

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NCATT EXAM 2025 QUESTIONS
AND ANSWERS

The "negative temperature coefficient" of a thermistor means that as temperature

increase resistance will?

Increase

Decrease

Remain the same - ....ANSWER ...-Decrease

Using the swamping resistor of thermal stability, what type of feedback is

developed to control the amplifier?

Regenerative

....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 1

,Degenerative

Positive feedback - ....ANSWER ...-Degerative

Which of the following devices is used to dissipate heat into the air?

Heat sink

Circuit Board

Swamping resistor

Coupling Capacitor - ....ANSWER ...-Heat sink

What type of amplifier coupling is used that can amplify DC voltages as well as AC

signals?

LC

....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 2

,RC

Direct

Transformer - ....ANSWER ...-Direct

In a common base amplifier, degenerative feedback is how many degrees out of

phase with the input signal?

0 degrees

90 degrees

180 degrees

270 degrees - ....ANSWER ...-180 degrees

The common base amplifier has a voltage gain _______ than one, but a current

gain _______ than one.

....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 3

, Less than one, less than one

Greater than one, less than one

Less than one, greater than one

Greater than one, greater than one - ....ANSWER ...-Greater than one, less

than one

What type of waveform is produced by a sinusoidal oscillator?

Saw tooth

Sine wave

Square wave

....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 4

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