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

Alternating current is produced by a voltage source which polarity:

Question # 3

The length of rotating vector (on a certain scale) represents the:

Question # 4

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

Question # 5

A digital system deals with quantities or variables which have

Question # 6

In RLC series circuit, resonance occurs when

Question # 7

The highest value reached by the voltage or current:

Question # 8

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

Question # 9

Alternating current can be transmitted:

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

If 250V is the RMS value of alternative voltage, then its peak value Vowill be:

Question # 16

The power factor of resonant series circuit is

Question # 17

The closed loop gain of the non-inverting amplifier is given by

Question # 18

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

Question # 19

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 # 20

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

Question # 21

Peak value of alternative current is:

Question # 22

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

Question # 23

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

Question # 24

Electromagnetic waves transmit energy equal to

Question # 25

The closed loop gain of the inverting amplifier is written as

Question # 26

The phase angle of a series RLC circuit at resonance is

Question # 27

Most OP-AMP operates with

Question # 28

The alternative voltage of current is actually measured by:

Question # 29

The RMS value of alternating current is:

Question # 30

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

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
Sr.# Question Answer
1 The magnitude of alternative voltage V:
A. Always increase
B. Always decrease
C. Remains constant
D. Does not remain constant
2 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
3 At resonance frequency the impedance of parallel resonance circuit is
A. Maximum
B. Minimum
C. Zero
D. None of the above
4 The sum of positive and negative peak values is called:
A. Instantaneous value
B. Peak value
C. Rms valuie
D. Peak-to peak-value
5 The most common source of alternating voltage is:
A. Motor
B. Transformer
C. AC genrator
D. Both (A) and (C)
6 SI unit of impedance is
A. hertz
B. henry
C. ampere
D. ohms
7 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
8 When the p-n junction is forward biased its resistance is of the order of
A. few mega ohms
B. few kilo ohms
C. few ohms
D. few milli ohms
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 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

Test Questions

Is this page helpful?