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

The power factor of resonant series circuit is

Question # 2

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

Question # 3

Chock consumes externally small

Question # 4

Average value of A.C voltage during one cycle is

Question # 5

When either L or C is increased, the resonant frequency of the RLC series circuit

Question # 6

In frequency modulation (FM), the carrier waves amplitude

Question # 7

At higher frequency of the alternating current, the capacitive reactance Xc

Question # 8

In RLC series circuit, resonance occurs when

Question # 9

Alternating current can induce voltage because it has a

Question # 10

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

Question # 11

In a transistor, if the central region is n-type, then this type of transistor is known as

Question # 12

The phase angle of a series RLC circuit at resonance is

Question # 13

The most common source of alternating voltage is:

Question # 14

The sum of positive and negative peak values is called:

Question # 15

During the positive half-cycle in the half-wave rectification,the diode

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 A P-N juction or semiconductor diode cannot be used as
A. A rectifier
B. Detector
C. Oscillator
D. An amplifier
2 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
3 Nowadays, Most of the electric energy is produced by the A.C. generators using:
A. Hydal water
B. Geothermal energy
C. Solar energy
D. Biomass
4 Average value of A.C voltage during one cycle is
A. 1
B. Zero
C. Maximum
D. Variable
5 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
6 The basic circuit element in D.C. circuit is:
A. A capacitor
B. A resistor
C. An inductor
D. Both (A) and (C)
7 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)
8 Alternating current is produced by a voltage source which polarity:
A. Remains the same
B. Reverse after period T
C. Keeps on reversing with time
D. Reverse after every time interval T/2
9 Alternating current can be transmitted:
A. To long distance
B. At very high cost
C. At very low cost
D. Both (A) and (C)
10 In which of the following diodes when an electron combines with a hole during the forward biasing, photon of visible light is emitted.
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. all of them

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