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 highest value reached by the voltage or current:

Question # 2

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

Question # 3

A diode characteristic curve is a plot between

Question # 4

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

Question # 5

In frequency modulation (FM), the carrier waves amplitude

Question # 6

In RLC series circuit, resonance occurs when

Question # 7

Which of the following diode is used to derive the current in external circuit when light is incident in the circuit

Question # 8

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

Question # 9

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

Question # 10

The amplifier which us used to perform mathematical operations electronically is known as

Question # 11

The Instantaneous value of alternative current maybe:

Question # 12

Transmitting antenna emits

Question # 13

The waveform of alternating voltage is a:

Question # 14

If 250V is the RMS value of alternative voltage, then its peak value Vowill be:

Question # 15

In n-p-n transistor, emitter base junction is kept

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The waveform of alternating voltage is a:
A. Square
B. Rectangular
C. Saw-tooth
D. Sinusoidal
2 The value of output resistance of OP-AMOP is of the order of
A. few ohms
B. few hundred ohms
C. several kilo ohms
D. several mega ohms
3 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
4 A digital system deals with quantities or variables which have
A. only one state
B. only two discrete states
C. three discrete states
D. four discrete states
5 The amplifier which us used to perform mathematical operations electronically is known as
A. calculator
B. OP-AMP
C. computer
D. any one of them
6 At resonance frequency the impedance of parallel resonance circuit is
A. Maximum
B. Minimum
C. Zero
D. None of the above
7 In series RC circuit when R=Xc, then the phase angle is
A. 0°
B. 90°
C. 70°
D. 45°
8 If we connect a A.C. volt meter to read A.C. voltage, It would read its:
A. RMS value
B. Instantaneous value
C. Valued average over a cycle
D. Zero
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 Which of the following has a great concentration of impurity
A. base
B. emitter
C. collector
D. none of these

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