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

Question # 3

Conversion of alternating current into direct current is called

Question # 4

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 # 5

OP-AMP has the following input terminals

Question # 6

The circuit which is used to smooth the output voltage of the full-wave rectification is known as

Question # 7

The basic circuit elements of A.C circuit are

Question # 8

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

Question # 9

A changing magnetic flux creates around itself

Question # 10

The total reactance of a series RLC circuit at resonance is

Question # 11

Alternating current can induce voltage because it has a

Question # 12

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

Question # 13

Which of the following has a great concentration of impurity

Question # 14

When electrons in the transmitting antenna vibrate 94000 time per second, they produce radiowaves having frequency

Question # 15

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

Question # 16

Which one of the following waves belongs to electromagnetic spectrum

Question # 17

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

Question # 18

The device which allows only the flow of an A.C. through a circuit is

Question # 19

The highest value reached by the voltage or current:

Question # 20

Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length

Question # 21

Peak value of alternative current is:

Question # 22

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

Question # 23

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

Question # 24

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

Question # 25

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

Question # 26

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

Question # 27

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

Question # 28

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

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 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
A. base and emitter
B. collector and emitter
C. base and collector
D. any one of these
2 Electromagnetic waves transmit energy equal to
A. 1/2 mv2
B. moc2
C. hf/c
D. hf
3 The value of the potential difference across the depletion region for the case of germanium is
A. 0.3 V
B. 0.5 V
C. 0.7 V
D. 0.9 V
4 During each cycle, alternating voltage reaches a peak value
A. One time
B. Two times
C. Four times
D. A number of times depending on the frequency
5 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
6 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
7 The bridge circuit of full wave rectification uses
A. one diode
B. two diode
C. three diode
D. four diode
8 The open loop gain of OP-AMP is of the order of
A. 102
B. 103
C. 104
D. 105
9 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
10 The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its
A. Icwill decrease
B. VCEwill increase
C. ICwill increase
D. VCCwill increase

Test Questions

Is this page helpful?

Share your comments & questions here

Guest

  • No comments yet. Be the first to comment!