ECAT Pre Computer Science Chapter 16 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 16 Alternating Current

Try The MCQ's Test For ECAT Physics Chapter 16 Alternating Current

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ECAT Physics Chapter 16 Alternating Current

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Question # 1

A diode characteristic curve is a plot between

Question # 2

The highest value reached by the voltage or current:

Question # 3

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

Question # 4

Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:

Question # 5

A changing magnetic flux creates around itself

Question # 6

Electromagnetic waves transmit energy equal to

Question # 7

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

Question # 8

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

Question # 9

The Instantaneous value of alternative current maybe:

Question # 10

The closed loop gain of the inverting amplifier is written as

Question # 11

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

Question # 12

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

Question # 13

If the value of C in a series RLC circuit is increased, the resonant frequency

Question # 14

Average value of A.C voltage during one cycle is

Question # 15

The total reactance of a series RLC circuit at resonance is

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 Electromagnetic waves transmit energy equal to
A. 1/2 mv2
B. moc2
C. hf/c
D. hf
3 The impedance of RLC series resonance circuit at resonant frequency is
A. Greater than R
B. Equal to R
C. Less than R
D. None of these
4 For normal operation of transistor, the batteries
A. VCCis of much lower value than VBB
B. VCCis of much higher value than VBB
C. VCC is equal toVBB
D. none of these
5 The alternative voltage of current is actually measured by:
A. Its RMS value
B. Square root of its mean square value
C. Instantaneous value
D. Peak value
6 In frequency modulation (FM), the carrier waves amplitude
A. Remains constant
B. Increase
C. Decreases
D. None of these
7 SI unit of impedance is
A. hertz
B. henry
C. ampere
D. ohms
8 When either L or C is increased, the resonant frequency of the RLC series circuit
A. Increases
B. Decreases
C. Remains the same
D. Becomes zero
9 At resonance, the phase angle for RLC series resonance circuit equals
A. 0°
B. 90°
C. 180°
D. 270°
10 Which of the following diodes can operate in the reverse biased condition
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. none of these

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  • Iiqra Fatima

    Iiqra Fatima

    25 May 2018

    You should let us practice difficult mcqs ..These are too easy for ECAT level....Thanku

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