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

An A.C varies as a function of

Question # 2

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

Question # 3

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

Question # 4

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

Question # 5

The wave form of alternating voltage is the graph between:

Question # 6

The bridge circuit of full wave rectification uses

Question # 7

Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length

Question # 8

The basic circuit elements of A.C circuit are

Question # 9

The value of the input resistance of OP-AMP is of the order of

Question # 10

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

Question # 11

The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its

Question # 12

A sinusoidally alternating voltage or current can be graphically represented by a:

Question # 13

The time interval during which the Voltage source changes its polarity once is known as:

Question # 14

Conversion of alternating current into direct current is called

Question # 15

The RMS value of alternating current is:

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 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)
3 The basic circuit elements of A.C circuit are
A. Resistor
B. Inductor
C. Capacitor
D. All the three
4 Which one of the following is correct?
A. Vo= 1.414 Vrms
B. Iams= 1.414 Io
C. VO = 10.70 Vrms
D. Both a and b
5 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
6 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
7 To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance
A. 5.07 pF
B. 50 pF
C. 0.507 pF
D. 507 pF
8 The magnitude of alternative voltage V:
A. Always increase
B. Always decrease
C. Remains constant
D. Does not remain constant
9 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
10 A resonance curve for RLC series circuit is a plot of frequency versus
A. Voltage
B. Current
C. Impedance
D. Reactance

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