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

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

Question # 2

An A.C varies as a function of

Question # 3

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

Question # 4

A P-N juction or semiconductor diode cannot be used as

Question # 5

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 # 6

The impedance of RLC series resonance circuit at resonant frequency is

Question # 7

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

Question # 8

The phase at the positive peak of an A.C. cycle is:

Question # 9

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

Question # 10

For normal operation of transistor, the batteries

Question # 11

Alternating current is produced by a voltage source which polarity:

Question # 12

The basic circuit elements of A.C circuit are

Question # 13

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

Question # 14

The highest value reached by the voltage or current:

Question # 15

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

Question # 16

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

Question # 17

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

Question # 18

Chock consumes externally small

Question # 19

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

Question # 20

At resonance, the phase angle for RLC series resonance circuit equals

Question # 21

The alternative voltage of current is actually measured by:

Question # 22

Alternating current can be transmitted:

Question # 23

In free space, the speed of electromagnetic waves is

Question # 24

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

Question # 25

The RMS value of alternating current is:

Question # 26

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

Question # 27

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

Question # 28

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

Question # 29

Average value of A.C voltage during one cycle is

Question # 30

Peak value of alternative current is:

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 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
2 The phase angle of a series RLC circuit at resonance is
A. 180°
B. 90°
C. 0°
D. None of the these
3 When either L or C is increased, the resonant frequency of the RLC series circuit
A. Increases
B. Decreases
C. Remains the same
D. Becomes zero
4 An A.C. voltage is applied across the inductor. When the frequency of the voltage is increased, the current
A. Decreases
B. Increases
C. Does not change
D. Momentarily goes to zero
5 The alternative voltage of current is actually measured by:
A. Its RMS value
B. Square root of its mean square value
C. Instantaneous value
D. Peak value
6 Which of the following has a great concentration of impurity
A. base
B. emitter
C. collector
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 The open loop gain of OP-AMP is of the order of
A. 102
B. 103
C. 104
D. 105
9 Which one of the following is correct?
A. Vo= 1.414 Vrms
B. Iams= 1.414 Io
C. VO = 10.70 Vrms
D. Both a and b
10 A diode characteristic curve is a plot between
A. current and time
B. voltage and time
C. voltage and current
D. forward voltage and reversed voltage

Test Questions

Is this page helpful?