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

For the normal operation of the transistor, its

Question # 2

SI unit of impedance is

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

In n-p-n transistor, emitter base junction is kept

Question # 7

The average of A.C. current and voltage over a complete cycle is

Question # 8

The power factor of resonant series circuit is

Question # 9

OP-AMP has the following input terminals

Question # 10

Which one of the following waves belongs to electromagnetic spectrum

Question # 11

The RMS value of alternating current is:

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

Average value of A.C voltage during one cycle is

Question # 16

In half wave rectification

Question # 17

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

Question # 18

Which of the following diode is used to derive the current in external circuit when light is incident in the circuit

Question # 19

Which of the following has a great concentration of impurity

Question # 20

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

Question # 21

At resonance frequency the impedance of parallel resonance circuit is

Question # 22

In RLC series circuit, resonance occurs when

Question # 23

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

Question # 24

In a transistor, the central region is called

Question # 25

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

Question # 26

The bridge circuit of full wave rectification uses

Question # 27

An A.C varies as a function of

Question # 28

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

Question # 29

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

Question # 30

The waveform of alternating voltage is a:

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 Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:
A. Peak value
B. RMS value
C. Instantaneous value
D. Peak-to-peak value
2 In an A.C circuit with resistor only, the current and voltage have a phase angle of
A. 90°
B. 0°
C. 180°
D. none of these
3 A signal is amplified at the output without any change of phase, if it is applied at the
A. inverting input
B. non-inverting input
C. at any of the input
D. none of these
4 The time interval during which the Voltage source changes its polarity once is known as:
A. Time period T
B. Half the time period
C. Quarter the time period
D. Two third of the time period
5 Peak value of alternative current is:
A. one of its Instantaneous value
B. Equal to its RMS value
C. The same as its peak-to-peak value
D. Both (B) and (C)
6 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
7 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
8 The magnitude of alternative voltage V:
A. Always increase
B. Always decrease
C. Remains constant
D. Does not remain constant
9 When the pn-junction is in reversed biased, current flows through the junction due to the
A. majority carriers
B. minority carriers
C. either of them
D. none of them
10 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

Test Questions

Share your comments & questions here

  • No comments yet. Be the first to comment!

Is this page helpful?