ECAT Pre Engineering Physics Chapter 16 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 16 Alternating Current

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

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Physics ECAT Pre Engineering Chapter 16 Alternating Current

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Question # 1

For the normal operation of the transistor, its

Question # 2

The basic circuit element in D.C. circuit is:

Question # 3

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

Question # 4

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

Question # 5

The highest value reached by the voltage or current:

Question # 6

In a transistor, the central region is called

Question # 7

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

Question # 8

The power factor of resonant series circuit is

Question # 9

Transmitting antenna emits

Question # 10

An A.C varies as a function of

Question # 11

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

Question # 12

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

Question # 13

The basic circuit elements of A.C circuit are

Question # 14

Conversion of alternating current into direct current is called

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 Transmitting antenna emits
A. Magnetic waves
B. Electric waves
C. Electromagnetic waves
D. Sound waves
2 Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is
A. zero
B. small
C. large
D. very large
3 At resonance frequency the impedance of parallel resonance circuit is
A. Maximum
B. Minimum
C. Zero
D. None of the above
4 The entire wave form of sinusoidal voltage is actually a set of all the:
A. Positive maximum value + Voand negative maximum value -Vo
B. Posiotive maximum value +Vo and zero
C. Zero and negative maximum value -Vo
D. Any of these
5 The most common source of alternating voltage is:
A. Motor
B. Transformer
C. AC genrator
D. Both (A) and (C)
6 If 250V is the RMS value of alternative voltage, then its peak value Vowill be:
A. 353.5V
B. 250V
C. 175V
D. zero
7 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
8 A P-N juction or semiconductor diode cannot be used as
A. A rectifier
B. Detector
C. Oscillator
D. An amplifier
9 The r.m.s. value of alternating current is equal to its maximum value at angle of
A. 60°
B. 45°
C. 30°
D. 90°
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

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