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

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

Question # 2

The impedance of RLC series resonance circuit at resonant frequency is

Question # 3

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

Question # 4

The sum of positive and negative peak values is called:

Question # 5

Alternating current is produced by a voltage source which polarity:

Question # 6

The input resistance of the OP-AMP is the resistance between the

Question # 7

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

Question # 8

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

Question # 9

In frequency modulation (FM), the carrier waves amplitude

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

The total reactance of a series RLC circuit at resonance is

Question # 15

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

Question # 16

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

Question # 17

Alternating current can induce voltage because it has a

Question # 18

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

Question # 19

Peak value of alternative current is:

Question # 20

OP-AMP has the following input terminals

Question # 21

In an A.C circuit with resistor only, the current and voltage have a phase angle of

Question # 22

A changing magnetic flux creates around itself

Question # 23

SI unit of impedance is

Question # 24

The Instantaneous value of alternative current maybe:

Question # 25

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

Question # 26

Chock consumes externally small

Question # 27

The alternative voltage of current is actually measured by:

Question # 28

In which of the following diodes when an electron combines with a hole during the forward biasing, photon of visible light is emitted.

Question # 29

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 # 30

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

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 diode is used for the detection of light
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. all of them
2 If we connected the ordinary DC ammeter to measure alternating current, it would measure its:
A. Instantaneous value
B. RMS value
C. Value averaged over a cycle
D. Either (B) or (C)
3 For a n-p-n transistor, the conventional current equation can be written as
A. IE+ IC= IB
B. IC- IB= IE
C. IC+ IB= IE
D. IB+ IE= IC
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 In half wave rectification
A. both halves of the input voltage is used
B. only one half of the input voltage is used
C. either of these
D. none of these
6 The closed loop gain of the non-inverting amplifier is given by
A. G = R2/R1
B. G = -R2/R1
C. G = 1 - R2/R1
D. G = 1 + T2/R1
7 The amplifier which us used to perform mathematical operations electronically is known as
A. calculator
B. OP-AMP
C. computer
D. any one of them
8 SI unit of impedance is
A. hertz
B. henry
C. ampere
D. ohms
9 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
10 The open loop gain of OP-AMP is of the order of
A. 102
B. 103
C. 104
D. 105

Test Questions

Is this page helpful?