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

Peak value of alternative current is:

Question # 2

At resonance frequency the impedance of parallel resonance circuit is

Question # 3

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

Question # 4

At resonance, the impedance of RLC series circuit is

Question # 5

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

Question # 6

The highest value reached by the voltage or current:

Question # 7

The time interval during which the Voltage source changes its polarity once is known as:

Question # 8

A changing magnetic flux creates around itself

Question # 9

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

Question # 10

Alternating current is produced by a voltage source which polarity:

Question # 11

Electromagnetic waves transmit energy equal to

Question # 12

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

Question # 13

The bridge circuit of full wave rectification uses

Question # 14

For a n-p-n transistor, the conventional current equation can be written as

Question # 15

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

Question # 16

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

Question # 17

Conversion of alternating current into direct current is called

Question # 18

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

Question # 19

Alternating current can induce voltage because it has a

Question # 20

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

Question # 21

A diode characteristic curve is a plot between

Question # 22

The amplifier which us used to perform mathematical operations electronically is known as

Question # 23

During each cycle, alternating voltage reaches a peak value

Question # 24

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

Question # 25

In RLC series circuit, resonance occurs when

Question # 26

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 # 27

The basic circuit elements of A.C circuit are

Question # 28

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

Question # 29

Which of the following has a great concentration of impurity

Question # 30

Mathematical manipulation of the two quantized states can be best carried if they are represented by

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 open loop gain of OP-AMP is of the order of
A. 102
B. 103
C. 104
D. 105
2 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
3 The phase angle of a series RLC circuit at resonance is
A. 180°
B. 90°
C. 0°
D. None of the these
4 The output voltage of half wave rectification is in the form of
A. a smooth curve
B. a smooth wave
C. pulses
D. all of the above
5 The waveform of alternating voltage is a:
A. Square
B. Rectangular
C. Saw-tooth
D. Sinusoidal
6 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
7 At resonance, the impedance of RLC series circuit is
A. Maximum
B. Zero
C. Minimum
D. Determinate
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 If we connect a A.C. volt meter to read A.C. voltage, It would read its:
A. RMS value
B. Instantaneous value
C. Valued average over a cycle
D. Zero
10 For the normal operation of the transistor, its
A. emitter-base and collector base junctions are forward biased
B. emitter-base junction is reversed biased and collector base junction is forward biased
C. emitter-base junction is forward biased and collector-base junction is reverse biased
D. any one of these

Test Questions

Is this page helpful?

Share your comments & questions here

Guest

  • No comments yet. Be the first to comment!