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 impedance of RLC series resonance circuit at resonant frequency is

Question # 3

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

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

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

Question # 6

The r.m.s. value of alternating current is equal to its maximum value at angle of

Question # 7

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

Question # 8

The Instantaneous value of alternative current maybe:

Question # 9

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

Question # 10

When the pn-junction is connected reversed biased, its resistance is of the order of

Question # 11

Which of the following diode is used for the detection of light

Question # 12

An A.C. voltmeter read 250 volts. The frequency of alternating is 50 Hz, the peak value of voltage is

Question # 13

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

Question # 14

In RLC series circuit, resonance occurs when

Question # 15

Average value of A.C voltage during one cycle is

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The basic circuit element in D.C. circuit is:
A. A capacitor
B. A resistor
C. An inductor
D. Both (A) and (C)
2 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
3 The basic circuit elements of A.C circuit are
A. Resistor
B. Inductor
C. Capacitor
D. All the three
4 The waveform of alternating voltage is a:
A. Square
B. Rectangular
C. Saw-tooth
D. Sinusoidal
5 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
6 OP-AMP has the following input terminals
A. one
B. two
C. three
D. four
7 Transmitting antenna emits
A. Magnetic waves
B. Electric waves
C. Electromagnetic waves
D. Sound waves
8 The Instantaneous value of alternative current maybe:
A. The same as its RMS value
B. Greater than its Rms value
C. The same as its peak value
D. Any of these
9 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)
10 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

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