Question # 1

In an A.C circuit with resistor only, the current and voltage have a phase angle of

Choose an answer

90°

0°

180°

none of these

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)

If the value of C in a series RLC circuit is increased, the resonant frequency

Choose an answer

Is not affected

Increase

Remains the same

Decreases

The power factor of resonant series circuit is

Choose an answer

1

0

-1

0.5

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

The average of A.C. current and voltage over a complete cycle is

Choose an answer

Maximum

zero

Neither zero nor maximum

None of these

Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length

Choose an answer

X-rays

Ultraviolet rays

y-rays

Cosmic rays

The alternative voltage of current is actually measured by:

Choose an answer

Its RMS value

Square root of its mean square value

Instantaneous value

Peak value

Both (A) and (B)

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

Choose an answer

light emitting diode

photo diode

photo voltaic cell

all of these

Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:

Choose an answer

Peak value

RMS value

Instantaneous value

Peak-to-peak value

Both (A) and (C0

For normal operation of transistor, the batteries

Choose an answer

V_CCis of much lower value than V_BB

V_CCis of much higher value than V_BB

V_{CC is equal to}V_BB

none of these

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)

The amplifier which us used to perform mathematical operations electronically is known as

Choose an answer

calculator

OP-AMP

computer

any one of them

Mathematical manipulation of the two quantized states can be best carried if they are represented by

Choose an answer

high - low

yes - no

on - off

0 - 1

A signal is amplified at the output without any change of phase, if it is applied at the

Choose an answer

inverting input

non-inverting input

at any of the input

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