ECAT Pre General Science Physics Chapter 16 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 16 Alternating Current

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

  • Total Questions30

  • Time Allowed30

Start Test Download PDF

ECAT Pre General Science Physics Chapter 16 Alternating Current

00:00
Question # 1

The value of current gain of n-p-n transistor is of the order of

Question # 2

In n-p-n transistor, emitter base junction is kept

Question # 3

The magnitude of alternative voltage V:

Question # 4

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

Question # 5

The basic circuit elements of A.C circuit are

Question # 6

A P-N juction or semiconductor diode cannot be used as

Question # 7

Alternating current is produced by a voltage source which polarity:

Question # 8

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

Question # 9

When the pn-junction is connected reversed biased, its resistance is of the order of

Question # 10

The power factor of resonant series circuit is

Question # 11

The impedance of RLC series resonance circuit at resonant frequency is

Question # 12

In frequency modulation (FM), the carrier waves amplitude

Question # 13

The basic circuit element in A.C. circuits are:

Question # 14

The phase angle of a series RLC circuit at resonance is

Question # 15

At resonance, the impedance of RLC series circuit is

Question # 16

A digital system deals with quantities or variables which have

Question # 17

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

Question # 18

The waveform of alternating voltage is a:

Question # 19

In series RC circuit when R=Xc, then the phase angle is

Question # 20

Conversion of alternating current into direct current is called

Question # 21

The RMS value of alternating current is:

Question # 22

The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its

Question # 23

The value of the input resistance of OP-AMP is of the order of

Question # 24

The highest value reached by the voltage or current:

Question # 25

Peak value of alternative current is:

Question # 26

In a transistor, the central region is called

Question # 27

In a transistor, if the central region is n-type, then this type of transistor is known as

Question # 28

SI unit of impedance is

Question # 29

Chock consumes externally small

Question # 30

A diode characteristic curve is a plot between

Submit

Prepare Complete Set Wise ECAT Pre General Science Physics Chapter 16 Alternating Current MCQs Online With Answers


Topic Test

00:00
Submit

Top Scorers Of ECAT Pre General Science Physics Chapter 16 Alternating Current MCQ`s Test

  • F
    Faiza 15 - Jan - 2024 05 Min 58 Sec 50/120
  • W
    Waleed Ahmed 25 - Feb - 2023 11 Min 06 Sec 45/120
  • O
    omama 24 - May - 2018 05 Min 38 Sec 25/120
  • H
    Hiba Akhtar 06 - Mar - 2023 03 Min 52 Sec 5/120

ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 The average of A.C. current and voltage over a complete cycle is
A. Maximum
B. zero
C. Neither zero nor maximum
D. None of these
3 In half wave rectification
A. both halves of the input voltage is used
B. only one half of the input voltage is used
C. either of these
D. none of these
4 If we connected the ordinary DC ammeter to measure alternating current, it would measure its:
A. Instantaneous value
B. RMS value
C. Value averaged over a cycle
D. Either (B) or (C)
5 In an A.C circuit with resistor only, the current and voltage have a phase angle of
A. 90°
B. 0°
C. 180°
D. none of these
6 The highest value reached by the voltage or current:
A. In quarter cycle is called Instantaneous value
B. In half cycle is called peak-to-peak value
C. In one cycle is called peak value
D. In half cycle is called Instantaneous value
7 The waveform of alternating voltage is a:
A. Square
B. Rectangular
C. Saw-tooth
D. Sinusoidal
8 A signal appears after amplification, at the output terminal with a phase shift of 180° , if it is applied at
A. inverting input
B. non-inverting input
C. any one of the input terminal
D. none of them
9 The basic circuit element in D.C. circuit is:
A. A capacitor
B. A resistor
C. An inductor
D. Both (A) and (C)
10 In a normally biased n-p-n transistor, an electron c current IEflows from the
A. emitter into the base
B. collector into the base
C. base into collector
D. none of these

Test Questions

Is this page helpful?

Share your comments & questions here

Guest

  • No comments yet. Be the first to comment!