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

Average value of A.C voltage during one cycle is

Question # 2

The basic circuit element in D.C. circuit is:

Question # 3

Chock consumes externally small

Question # 4

The sum of positive and negative peak values is called:

Question # 5

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

Question # 6

The total reactance of a series RLC circuit at resonance is

Question # 7

If 250V is the RMS value of alternative voltage, then its peak value Vowill be:

Question # 8

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

Question # 9

If we connected the ordinary DC ammeter to measure alternating current, it would measure its:

Question # 10

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

Question # 11

The wave form of alternating voltage is the graph between:

Question # 12

Electromagnetic waves transmit energy equal to

Question # 13

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

Question # 14

An A.C. voltage is applied across the inductor. When the frequency of the voltage is increased, the current

Question # 15

In free space, the speed of electromagnetic waves is

Question # 16

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 # 17

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 # 18

A diode characteristic curve is a plot between

Question # 19

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

Question # 20

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

Question # 21

A digital system deals with quantities or variables which have

Question # 22

In half wave rectification

Question # 23

A p-n junction is formed when a crystal of silicon is growth in such a way that its one half is doped with trivalent impurity and the other half with a impurity from

Question # 24

Most OP-AMP operates with

Question # 25

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

Question # 26

Which one of the following is correct?

Question # 27

To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance

Question # 28

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

Question # 29

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

Question # 30

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

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 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
2 At higher frequency of the alternating current, the capacitive reactance Xc
A. Increases
B. Decreases
C. Remains the same
D. Increases only when the voltage increases
3 In free space, the speed of electromagnetic waves is
A. 3 x 108ms-1
B. 3 x 106ms-1
C. 4 x 107ms-1
D. 3 x 109ms-1
4 At resonance frequency the impedance of parallel resonance circuit is
A. Maximum
B. Minimum
C. Zero
D. None of the above
5 A changing magnetic flux creates around itself
A. An electromotive force
B. An electric field (changing electric flux)
C. Magnetic field
D. None of the above
6 Alternating current is produced by a voltage source which polarity:
A. Remains the same
B. Reverse after period T
C. Keeps on reversing with time
D. Reverse after every time interval T/2
7 At resonance, the impedance of RLC series circuit is
A. Maximum
B. Zero
C. Minimum
D. Determinate
8 The value of the input resistance of OP-AMP is of the order of
A. few ohms
B. few hundred ohms
C. several kilo ohms
D. several maga ohms
9 The r.m.s. value of alternating current is equal to its maximum value at angle of
A. 60°
B. 45°
C. 30°
D. 90°
10 In which of the following components, pn-junction is used
A. light emitting diode
B. photo diode
C. photo voltaic cell
D. all of these

Test Questions

Is this page helpful?