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

SI unit of impedance is

Question # 3

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

Question # 4

The magnitude of alternative voltage V:

Question # 5

The closed loop gain of the non-inverting amplifier is given by

Question # 6

The basic circuit element in A.C. circuits are:

Question # 7

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

Question # 8

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

Question # 9

A diode characteristic curve is a plot between

Question # 10

The R1= infinity and R2= 0, then the gain of non-inverting amplifier is

Question # 11

The open loop gain of OP-AMP is of the order of

Question # 12

Transmitting antenna emits

Question # 13

In frequency modulation (FM), the carrier waves amplitude

Question # 14

OP-AMP has the following input terminals

Question # 15

Most OP-AMP operates with

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The wave form of alternating voltage is the graph between:
A. Voltage across X-axis and time across y-axis
B. Current and time
C. Voltage along y-axis and time along x-axis
D. Voltage and current
2 In RLC series circuit, resonance occurs when
A. XL > Xc
B. XL < Xc
C. XL = Xc
D. None of these
3 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
4 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
5 In a transistor, the central region is called
A. collector
B. emitter
C. base
D. none of them
6 An A.C varies as a function of
A. Current
B. Voltage
C. Time
D. Charge
7 In free space, the speed of electromagnetic waves is
A. 3 x 108ms-1
B. 3 x 106ms-1
C. 4 x 107ms-1
D. 3 x 109ms-1
8 Alternating current can be transmitted:
A. To long distance
B. At very high cost
C. At very low cost
D. Both (A) and (C)
9 The time interval during which the Voltage source changes its polarity once is known as:
A. Time period T
B. Half the time period
C. Quarter the time period
D. Two third of the time period
10 During the positive half-cycle in the half-wave rectification,the diode
A. does not conduct
B. conducts
C. either of these
D. neither of these

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