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Analog-designs Questions Set 62:

Quiz Mode

If the voltage gain increases from 10V to 100V, find the decibel (dB) voltage gain.

Solution:

Given that the feedback loop gain of an op-amp is 10, find the open-loop gain for the op-amp such that the relative gain error is 1%.

100

1000

10000

Solution:

Which of the following is not a characteristic of an ideal op-amp?

Infinite Open Loop Gain

Infinite Common Mode Rejection Ratio

Infinite Output Impedance

Infinite Bandwidth

Solution:

A 10 kW carrier wave is amplitude modulated at 80% depth of modulation by a sinusoidal modulating signal. Calculate the transmission efficiency of the AM wave.

24.2%

33.3%

66.6%

92.8%

Solution:

A low voltage AC signal is to be converted to a high voltage DC signal. Which circuit is required for this purpose?

Step-up transformer

Voltage divider

Voltage multiplier

Rectifier using diodes

Solution:

The basic step of a 9-bit digital-to-analog converter (DAC) is 10.3 mV. If the input digital value 00000000 represents 0 V, what output voltage is produced if the input is 101101111?

1.143 V

3.671 V

2.46 V

3.78 V

Solution:

Which of the following statements is true for a transistor push-pull amplifier?

There is no distortion in the output.

There is no DC present in the output.

There are no even harmonics in the output.

There are no odd harmonics in the output.

Solution:

Why do semiconductors have a negative temperature coefficient?

Electrons start moving to the conduction band as the temperature increases

All of the above

The resistivity decreases with an increase in temperature

Conductivity increases with an increase in temperature

Solution:

Which of the following statements is true about a JFET (Junction Field-Effect Transistor)?

Current conduction is due to both majority and minority charge carriers

It is a bipolar device

Current conduction is due to only one type of charge carrier

Gain is characterized by voltage gain

Solution:

Which of the following statements is correct regarding hole mobility in Germanium (Ge) and Silicon (Si)?

Germanium (Ge) has higher hole mobility than Silicon (Si)

Silicon (Si) has higher hole mobility than Germanium (Ge)

Both Germanium (Ge) and Silicon (Si) have the same hole mobility

Neither Germanium (Ge) nor Silicon (Si) have any hole mobility

Analog-designs Questions Set 62:

If the voltage gain increases from 10V to 100V, find the decibel (dB) voltage gain.

Solution:

Given that the feedback loop gain of an op-amp is 10, find the open-loop gain for the op-amp such that the relative gain error is 1%.

Solution:

Which of the following is not a characteristic of an ideal op-amp?

Solution:

A 10 kW carrier wave is amplitude modulated at 80% depth of modulation by a sinusoidal modulating signal. Calculate the transmission efficiency of the AM wave.

Solution:

A low voltage AC signal is to be converted to a high voltage DC signal. Which circuit is required for this purpose?

Solution:

The basic step of a 9-bit digital-to-analog converter (DAC) is 10.3 mV. If the input digital value 00000000 represents 0 V, what output voltage is produced if the input is 101101111?

Solution:

Which of the following statements is true for a transistor push-pull amplifier?

Solution:

Why do semiconductors have a negative temperature coefficient?

Solution:

Which of the following statements is true about a JFET (Junction Field-Effect Transistor)?

Solution:

Which of the following statements is correct regarding hole mobility in Germanium (Ge) and Silicon (Si)?

Solution:

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