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

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

Question # 2

The waveform of alternating voltage is a:

Question # 3

The alternative voltage of current is actually measured by:

Question # 4

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

Question # 5

In describing functions of digital systems, a closed switch will be shown as

Question # 6

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

Question # 7

Chock consumes externally small

Question # 8

In a transistor, the central region is called

Question # 9

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

Question # 10

SI unit of impedance is

Question # 11

During each cycle, alternating voltage reaches a peak value

Question # 12

The phase angle of a series RLC circuit at resonance is

Question # 13

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

Question # 14

In frequency modulation (FM), the carrier waves amplitude

Question # 15

The Instantaneous value of alternative current maybe:

Question # 16

A signal is amplified at the output without any change of phase, if it is applied at the

Question # 17

A sinusoidally alternating voltage or current can be graphically represented by a:

Question # 18

In half wave rectification

Question # 19

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

Question # 20

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

Question # 21

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

Question # 22

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

Question # 23

The bridge circuit of full wave rectification uses

Question # 24

A changing magnetic flux creates around itself

Question # 25

When the emitter-base junction of a transistor is reverse biased, collector current

Question # 26

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

Question # 27

A digital system deals with quantities or variables which have

Question # 28

At resonance, the impedance of RLC series circuit is

Question # 29

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

Question # 30

The RMS value of alternating 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 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
2 In RLC series circuit, resonance occurs when
A. XL > Xc
B. XL < Xc
C. XL = Xc
D. None of these
3 Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length
A. X-rays
B. Ultraviolet rays
C. y-rays
D. Cosmic rays
4 The length of rotating vector (on a certain scale) represents the:
A. Peak value of alternating quantity
B. RMS value of alternating quantity
C. Instantaneous value of alternating quantity
D. Either (B) or (C)
5 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
6 The waveform of alternating voltage is a:
A. Square
B. Rectangular
C. Saw-tooth
D. Sinusoidal
7 A resonance curve for RLC series circuit is a plot of frequency versus
A. Voltage
B. Current
C. Impedance
D. Reactance
8 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
9 In a normally biased n-p-n transistor, an electron c current IEflows from the
A. emitter into the base
B. collector into the base
C. base into collector
D. none of these
10 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

Test Questions

Is this page helpful?