1000+ Analog-designs Questions - Set 56 [With Solutions]

Analog-designs Questions Set 56:

Quiz Mode

Analog-designs Questions

Set 56/66

Calculate the thermal voltage at room temperature (27°C).

10mV

20mV

26mV

22mV

Why can't a JFET provide high voltage gain?

low values of μ

large values of μ

large values of G_m

low values of g_m

A MOSFET is designed to operate at I_d = 0.1 mA such that g_m = 1 mA/V. If K_n' = 50 μA/V², what is the required W/L ratio?

100

175

If the emitter resistance of a transistor increases, the collector voltage

decreases

stays the same

increases

breaks down the transistor

On which principle does a Zener diode work?

Tunneling of charge carriers across the junction

Hopping of charge carriers

Thermionic emission

None of the above

Which of the following equations does not hold for a MOSFET operating in the linear region?

VGS > VT

VDS < VGS - VT

VDS > VGS - VT

Id = Kn * [(VGS-VT)VDS - (VDS^2)/2]

Which of these is incorrect for an operational amplifier?

It has a high voltage gain

It is a direct coupled amplifier

It is only useful for amplifying AC signals

It was originally designed to perform mathematical operations

Op-amps are used as amplifiers in which region?

the entire range of the input voltage.

the linear region limited by -Vt/2 and +Vt/2 (approximately).

the linear region limited by -Vt and +Vt (approximately).

the saturation region, i.e., Vin >> Vt.

Which of the following is true about the photoelectric effect?

The maximum velocity of the emitted electrons increases with decreasing wavelength of the incident light.

The velocity of emitted electrons is dependent on the light intensity.

The rate of photoelectron emission is inversely proportional to the light intensity.

Both holes and electrons are produced in the photoelectric effect.

Which of the following statements about a zener voltage regulator is false?

The zener diode is always reverse biased and is connected in parallel to the load.

The purpose is to maintain a constant DC output voltage across the load despite variations in the input voltage.

The zener voltage regulator consists of a current limiting resistor Rs connected in parallel with the input voltage.

The stabilized output voltage is always selected to be the same as the breakdown voltage Vz of the zener diode.

Quiz Mode

Qn. Sets

Analog-designs Questions Set 56:

Analog-designs Questions

Calculate the thermal voltage at room temperature (27°C).

Reveal Answer

Reveal Answer

Why can't a JFET provide high voltage gain?

Reveal Answer

Reveal Answer

A MOSFET is designed to operate at Id = 0.1 mA such that gm = 1 mA/V. If Kn' = 50 μA/V2, what is the required W/L ratio?

Reveal Answer

Reveal Answer

If the emitter resistance of a transistor increases, the collector voltage

Reveal Answer

Reveal Answer

On which principle does a Zener diode work?

Reveal Answer

Reveal Answer

Which of the following equations does not hold for a MOSFET operating in the linear region?

Reveal Answer

Reveal Answer

Which of these is incorrect for an operational amplifier?

Reveal Answer

Reveal Answer

Op-amps are used as amplifiers in which region?

Reveal Answer

Reveal Answer

Which of the following is true about the photoelectric effect?

Reveal Answer

Reveal Answer

Which of the following statements about a zener voltage regulator is false?

Reveal Answer

Reveal Answer

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A MOSFET is designed to operate at I_d = 0.1 mA such that g_m = 1 mA/V. If K_n' = 50 μA/V², what is the required W/L ratio?