Question # 1

The length of rotating vector (on a certain scale) represents the:

Choose an answer

Peak value of alternating quantity

RMS value of alternating quantity

Instantaneous value of alternating quantity

Either (B) or (C)

Either (A) or (B)

Average value of A.C voltage during one cycle is

Choose an answer

1

Zero

Maximum

Variable

Which of the following has a great concentration of impurity

Choose an answer

base

emitter

collector

none of these

The open loop gain of OP-AMP is of the order of

Choose an answer

10²

10³

10⁴

10⁵

OP-AMP has the following input terminals

Choose an answer

one

two

three

four

The basic circuit element in D.C. circuit is:

Choose an answer

A capacitor

A resistor

An inductor

Both (A) and (C)

Both (A) and (B)

If we connected the ordinary DC ammeter to measure alternating current, it would measure its:

Choose an answer

Instantaneous value

RMS value

Value averaged over a cycle

Either (B) or (C)

Either (A) or (C)

In which of the following components, pn-junction is used

Choose an answer

light emitting diode

photo diode

photo voltaic cell

all of these

An A.C. voltage is applied across the inductor. When the frequency of the voltage is increased, the current

Choose an answer

Decreases

Increases

Does not change

Momentarily goes to zero

When the emitter-base junction of a transistor is reverse biased, collector current

Choose an answer

Reverses

Increases

Decreases

Stops

During the positive half-cycle in the half-wave rectification,the diode

Choose an answer

does not conduct

conducts

either of these

neither of these

Nowadays, Most of the electric energy is produced by the A.C. generators using:

Choose an answer

Hydal water

Geothermal energy

Solar energy

Biomass

Both (B) and (D)

Which of the following diodes can operate in the reverse biased condition

Choose an answer

photo diode

light emitting diode

photo voltaic cell

none of these

In half wave rectification

Choose an answer

both halves of the input voltage is used

only one half of the input voltage is used

either of these

none of these

Which one of the following waves belongs to electromagnetic spectrum

Choose an answer

Radio and TV waves

Radar waves

Micro waves

All of them

A sinusoidally alternating voltage or current can be graphically represented by a:

Choose an answer

Vector

Rotating vector

Clockwise vector

Anticlockwise voltage vector

None of these

More Classes

Other Links

ECAT Physics Chapter 16 Alternating Current Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer