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 most common source of alternating voltage is:

Question # 2

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

Question # 3

A signal appears after amplification, at the output terminal with a phase shift of 180° , if it is applied at

Question # 4

The entire wave form of sinusoidal voltage is actually a set of all the:

Question # 5

In describing functions of digital systems, a closed switch will be shown as

Question # 6

A resonance curve for RLC series circuit is a plot of frequency versus

Question # 7

For the normal operation of the transistor, its

Question # 8

In a normally biased n-p-n transistor, an electron c current IEflows from the

Question # 9

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

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

The basic circuit elements of A.C circuit are

Question # 15

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

Question # 16

The sum of positive and negative peak values is called:

Question # 17

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

Question # 18

The input resistance of the OP-AMP is the resistance between the

Question # 19

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

Question # 20

For normal operation of transistor, the batteries

Question # 21

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

Question # 22

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

Question # 23

At resonance, the impedance of RLC series circuit is

Question # 24

In half wave rectification

Question # 25

The total reactance of a series RLC circuit at resonance is

Question # 26

Alternating current is produced by a voltage source which polarity:

Question # 27

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 # 28

The RMS value of alternating current is:

Question # 29

Conversion of alternating current into direct current is called

Question # 30

When the pn-junction is forward biased. the current flows through it is of the order of

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 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
2 To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance
A. 5.07 pF
B. 50 pF
C. 0.507 pF
D. 507 pF
3 A digital system deals with quantities or variables which have
A. only one state
B. only two discrete states
C. three discrete states
D. four discrete states
4 Alternating current can induce voltage because it has a
A. High peak value
B. Varying magnetic field
C. Stronger field than direct curren
D. Constant magnetic field
5 A sinusoidally alternating voltage or current can be graphically represented by a:
A. Vector
B. Rotating vector
C. Clockwise vector
D. Anticlockwise voltage vector
6 The phase angle of a series RLC circuit at resonance is
A. 180°
B. 90°
C. 0°
D. None of the these
7 Electromagnetic waves transmit energy equal to
A. 1/2 mv2
B. moc2
C. hf/c
D. hf
8 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
9 During the negative half-cycle of the half-wave rectification, the diode
A. does not conduct
B. conducts
C. either of these
D. none of these
10 In describing functions of digital systems, a closed switch will be shown as
A. 0
B. 1
C. low
D. any one of these

Test Questions

Is this page helpful?

Share your comments & questions here

Guest

  • No comments yet. Be the first to comment!