Operational Amplifier and Its Applications MCQs

Question 1

In parallel resonance, there is

Accepted Answer

current amplification

Answer

both voltage and current amplification

Answer

voltage amplification

Answer

none of the above

Question 2

Tuned class C amplifiers are used for RF signals of

Accepted Answer

none of the above

Answer

low power

Answer

high power

Answer

very low power

Question 3

An ideal voltage amplifier should have

Accepted Answer

R = R0 = 0

Answer

R =0,R0= 0

Answer

R. = 0, R0 =0

Answer

R=oo,R0oo =0

Question 4

An ideal current amplifier should have

Accepted Answer

R =0, R0 =0

Answer

R =0,Ro= 0

Answer

R = oe,R0 =0

Answer

R = oo,R0=00

Question 5

In logarithmic amplifiers, output voltage is equal to

Accepted Answer

input voltage

Answer

log10 (input voltage)

Answer

loge (input voltage)

Question 6

Logarithmic amplifiers are used in

Accepted Answer

dividers

Answer

adders

Answer

multipliers

Answer

all of the above

Question 7

Which amplifier will be preferred for highest gain?

Accepted Answer

Cascode amplifier

Answer

Darlington's pair

Answer

Cascade amplifier

Answer

Depends on the circuitry

Question 8

A cascade amplifier will have higher cut-off frequency

Accepted Answer

less than that of single stage amplifier

Answer

equal to that of single stage amplifier

Answer

more than that of single stage amplifier.

Question 9

A push pull amplifiers balances out

Accepted Answer

odd harmonics

Answer

even harrnoics

Answer

both odd' as well as even harmonics .

Answer

neither odd nor even harmonics