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

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

Question # 2

The waveform of alternating voltage is a:

Question # 3

A digital system deals with quantities or variables which have

Question # 4

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

Question # 5

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

Question # 6

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

Question # 7

The Instantaneous value of alternative current maybe:

Question # 8

When a transistor is used as a switch the circuit in which the current is to be switched OFF and ON, is connected between the

Question # 9

For a n-p-n transistor, the conventional current equation can be written as

Question # 10

In which of the following diodes when an electron combines with a hole during the forward biasing, photon of visible light is emitted.

Question # 11

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

Question # 12

Which of the following diode is used for the detection of light

Question # 13

During the negative half-cycle of the half-wave rectification, the diode

Question # 14

When the p-n junction is forward biased its resistance is of the order of

Question # 15

The value of the potential difference across the depletion region for the case of germanium is

Question # 16

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

Question # 17

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

Question # 18

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

Question # 19

At higher frequency of the alternating current, the capacitive reactance Xc

Question # 20

A diode characteristic curve is a plot between

Question # 21

Which one of the following is correct?

Question # 22

For the normal operation of the transistor, its

Question # 23

The output voltage of half wave rectification is in the form of

Question # 24

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

Question # 25

The wave form of alternating voltage is the graph between:

Question # 26

In free space, the speed of electromagnetic waves is

Question # 27

Alternating current is produced by a voltage source which polarity:

Question # 28

When the pn-junction is in reversed biased, current flows through the junction due to the

Question # 29

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

Question # 30

When either L or C is increased, the resonant frequency of the RLC series circuit

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 A P-N juction or semiconductor diode cannot be used as
A. A rectifier
B. Detector
C. Oscillator
D. An amplifier
2 Alternating current can be transmitted:
A. To long distance
B. At very high cost
C. At very low cost
D. Both (A) and (C)
3 In which of the following diodes when an electron combines with a hole during the forward biasing, photon of visible light is emitted.
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. all of them
4 A sinusoidally alternating voltage or current can be graphically represented by a:
A. Vector
B. Rotating vector
C. Clockwise vector
D. Anticlockwise voltage vector
5 The closed loop gain of the non-inverting amplifier is given by
A. G = R2/R1
B. G = -R2/R1
C. G = 1 - R2/R1
D. G = 1 + T2/R1
6 In frequency modulation (FM), the carrier waves amplitude
A. Remains constant
B. Increase
C. Decreases
D. None of these
7 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
8 Which of the following diodes can operate in the reverse biased condition
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. none of these
9 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
10 The phase at the positive peak of an A.C. cycle is:
A. 0º

B. 90º

C. 180º

D. 0 andᏘ

Test Questions

Is this page helpful?

Share your comments & questions here

Guest

  • No comments yet. Be the first to comment!