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Analog-designs Questions Set 38:

Quiz Mode

What is the conduction angle for a Class B push-pull amplifier?

0 degrees

90 degrees

180 degrees

270 degrees

Solution:

Which substance is used to maintain electrical insulation between a heat sink and a transistor?

Plastic

Fiber

Ceramic

Mica

Solution:

In which application is a Hartley Oscillator mostly preferred?

FM Generation

RF Amplifier

AF Amplifier

Coherent Detectors

Solution:

Neglecting Channel Length Modulation, if the transconductance (gm) of the MOSFET increases, the gain of the common-source follower stage will:

decrease

increase

not get affected

double

Solution:

A mixer is operated with 230 V of AC supplied with a power rating of 460 W for one minute. Find the number of electrons flowing in one minute.

300 x 10^18

750 x 10^18

30 x 10^34

75 x 10^34

Solution:

Why did Bailey have to incorporate a negative resistance in her oscillator?

To dampen the oscillation

To sustain the oscillation

To bias the oscillator

To increase the amplitude of oscillation

Solution:

Which one of the following statements about an RC phase shift oscillator is not true?

It is less costly

It can produce a pure sine wave output

It is not bulky

It is effective for oscillations less than 10 kHz

Solution:

Determine the carrier frequency of a frequency modulated signal which is modulated by a 5 kHz sine wave and reaches a maximum frequency of 100.03 MHz and a minimum frequency of 99.97 MHz.

100.03 MHz

100 MHz

99.97 MHz

97.99 MHz

Solution:

The current gain of a bipolar junction transistor (BJT) will be reduced if which of the following changes are made to the BJT?

Base width is reduced

Collector doping concentration is increased

Emitter doping concentration to base doping concentration ratio is reduced

None of the above

Solution:

The basic requirements for the successful firing or turning on of a thyristor are that the current supplied to the gate should:

Be of adequate amplitude and sufficiently short rise time.

Be of adequate duration.

Occur at a time when the main circuit conditions are favorable to conduction.

All of the above.

Analog-designs Questions Set 38:

What is the conduction angle for a Class B push-pull amplifier?

Solution:

Which substance is used to maintain electrical insulation between a heat sink and a transistor?

Solution:

In which application is a Hartley Oscillator mostly preferred?

Solution:

Neglecting Channel Length Modulation, if the transconductance (gm) of the MOSFET increases, the gain of the common-source follower stage will:

Solution:

A mixer is operated with 230 V of AC supplied with a power rating of 460 W for one minute. Find the number of electrons flowing in one minute.

Solution:

Why did Bailey have to incorporate a negative resistance in her oscillator?

Solution:

Which one of the following statements about an RC phase shift oscillator is not true?

Solution:

Determine the carrier frequency of a frequency modulated signal which is modulated by a 5 kHz sine wave and reaches a maximum frequency of 100.03 MHz and a minimum frequency of 99.97 MHz.

Solution:

The current gain of a bipolar junction transistor (BJT) will be reduced if which of the following changes are made to the BJT?

Solution:

The basic requirements for the successful firing or turning on of a thyristor are that the current supplied to the gate should:

Solution:

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