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 free space, the speed of electromagnetic waves is

Question # 2

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

Question # 3

The highest value reached by the voltage or current:

Question # 4

In frequency modulation (FM), the carrier waves amplitude

Question # 5

The alternative voltage of current is actually measured by:

Question # 6

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

Question # 7

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

Question # 8

Most OP-AMP operates with

Question # 9

Peak value of alternative current is:

Question # 10

Alternating current can induce voltage because it has a

Question # 11

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

Question # 12

Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is

Question # 13

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

Question # 14

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

Question # 15

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

Question # 16

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

Question # 17

Which of the following has a great concentration of impurity

Question # 18

The RMS value of alternating current is:

Question # 19

During the positive half-cycle in the half-wave rectification,the diode

Question # 20

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

Question # 21

During each cycle, alternating voltage reaches a peak value

Question # 22

Conversion of alternating current into direct current is called

Question # 23

For normal operation of transistor, the batteries

Question # 24

The power factor of resonant series circuit is

Question # 25

The magnitude of alternative voltage V:

Question # 26

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

Question # 27

The r.m.s. value of alternating current is equal to its maximum value at angle of

Question # 28

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

Question # 29

The closed loop gain of the inverting amplifier is written as

Question # 30

In RLC series circuit, resonance occurs when

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 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)
2 The RMS value of alternating current is:
A. 0.7 times at the peak value
B. 0.5 times the peak value
C. 0.7 times the Instantaneous value
D. Equal to maximum voltage
3 The amplifier which us used to perform mathematical operations electronically is known as
A. calculator
B. OP-AMP
C. computer
D. any one of them
4 Which of the following has a great concentration of impurity
A. base
B. emitter
C. collector
D. none of these
5 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
6 Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is
A. zero
B. small
C. large
D. very large
7 The length of rotating vector (on a certain scale) represents the:
A. Peak value of alternating quantity
B. RMS value of alternating quantity
C. Instantaneous value of alternating quantity
D. Either (B) or (C)
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 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
10 Chock consumes externally small
A. Charge
B. Current
C. Power
D. Potential

Test Questions

Is this page helpful?

Share your comments & questions here

Guest

  • No comments yet. Be the first to comment!