Analog electronics quiz - III

Welcome to Analog Electronics - III quiz. This quiz consists of 20 multiple choice questions and you will have 20 minutes to answer.

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In an amplifier the voltage gain is the ratio of

output voltage and emitter resistance

output voltage and input current

output voltage and input voltage

none of the above

In digital circuits Schottky transistors are preferred over normal transistors because of their

lower propagation delay

lower power dissipation

higher propagation delay

higher power dissipation

When a diode is not conducting, its bias is

forward

zero

reverse

If in a thyristor the gate current is increased, then

anode current will increase

anode current will decrease

anode current will remain constant

anode current may increase or decrease

What effect to bandwidth can be seen with the addition of a negative feedback network?

Decrease

Increase

Decrease and then increases

increase and then decrease

Which bias must the input portion and output portion must a transistor to be in order to work as amplifier?

Forward, Forward

Reverse, Forward

Forward, Reverse

For high frequencies a capacitor like

an open circuit

a short circuit

either open circuit or short circuit

none of the above

RF amplifiers are used in radio receivers for

better sensitivity

improved signal-to-noise ratio

better coupling of receiver to the antenna

all of the above

Negative feedback reduces noise originating at the amplifier input.

True

False

10.

Important use of having a resistor at the emitter in Ce amplifier?

Regulation

maintenance

Stability

compensation

11.

12.

A zener voltage maintain at constant 60v, over a current range from 5 to 10.input voltage is 100v.determine the value of R for a voltage regulation from load current IL=0mA to IL max. what will be value of IL max.

30mA

35mA

45mA

40mA

13.

What is the value of the resistance when 1020 electrons move when a 100 v of voltage is supplied for an interval of 5 sec?

22Ω

20Ω

31Ω

45Ω

14.

What is the value of Av for a CE amplifier whose Ai is 0.97, RL is 1.2k Ω and input resistance is 28.5Ω?

-41.1

-40

41.1

4.0

15.

To prevent a DC return between source and load, it is necessary to use

resistor between source and load

inductor between source and load

capacitor between source and load

either (a) or (b)

16.

For a negative feedback what will be the relation between gain with and without feedback

Decrease

Increase

Decrease and then increases

Increase and then decrease

17.

Which of the following condition is correct, if a FET is operating in the amplification region?

VGSQ ≤Vi - VT

VGSQ ≥Vi + VT

VGSQ ≥Vi - VT

VGSQ ≤ Vi +VT

18.

The output impedance of an ideal op-amp is

zero

low

high

infinite

19.

The transistor FET is _______ control devices?

Current

Voltage

Power

Current& voltage

20.

Positive feedback leads to

Stability in the gain of the amplifier

Decrease the gain of the amplifier

Instability in the gain of the amplifier

None of these

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Analog electronics quiz – III