ECAT Pre Computer Science Chapter 16 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 16 Alternating Current

Try The MCQ's Test For ECAT Physics Chapter 16 Alternating Current

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ECAT Physics Chapter 16 Alternating Current

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Question # 1

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

Question # 2

An A.C. voltmeter read 250 volts. The frequency of alternating is 50 Hz, the peak value of voltage is

Question # 3

Which one of the following is correct?

Question # 4

A changing magnetic flux creates around itself

Question # 5

The R1= infinity and R2= 0, then the gain of non-inverting amplifier is

Question # 6

The Instantaneous value of alternative current maybe:

Question # 7

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

Question # 8

The phase angle of a series RLC circuit at resonance is

Question # 9

In frequency modulation (FM), the carrier waves amplitude

Question # 10

Which of the following diode is used to derive the current in external circuit when light is incident in the circuit

Question # 11

OP-AMP has the following input terminals

Question # 12

The value of output resistance of OP-AMOP is of the order of

Question # 13

If we connect a A.C. volt meter to read A.C. voltage, It would read its:

Question # 14

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

Question # 15

Most OP-AMP operates with

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 In a transistor, if the central region is p-type then this type of transistor is known as
A. p-n-p transistor
B. n-p-n transistor
C. either of these
D. none of these
2 Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:
A. Peak value
B. RMS value
C. Instantaneous value
D. Peak-to-peak value
3 The R1= infinity and R2= 0, then the gain of non-inverting amplifier is
A. zero
B. infinity
C. one
D. any one of these
4 At resonance, the phase angle for RLC series resonance circuit equals
A. 0°
B. 90°
C. 180°
D. 270°
5 The most common source of alternating voltage is:
A. Motor
B. Transformer
C. AC genrator
D. Both (A) and (C)
6 Which one of the following waves belongs to electromagnetic spectrum
A. Radio and TV waves
B. Radar waves
C. Micro waves
D. All of them
7 The circuit which is used to smooth the output voltage of the full-wave rectification is known as
A. transformer
B. rectifier
C. filter
D. none of these
8 Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length
A. X-rays
B. Ultraviolet rays
C. y-rays
D. Cosmic rays
9 An A.C. voltmeter read 250 volts. The frequency of alternating is 50 Hz, the peak value of voltage is
A. 3525.0 volts
B. 35.35 volts
C. 353.5 volts
D. 3.535 volts
10 The power factor of resonant series circuit is
A. 1
B. 0
C. -1
D. 0.5

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