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

Question # 2

When the pn-junction is forward biased. the current flows through it is of the order of

Question # 3

For a n-p-n transistor, the conventional current equation can be written as

Question # 4

When a transistor is used as a switch the circuit in which the current is to be switched OFF and ON, is connected between the

Question # 5

In a normally biased n-p-n transistor, an electron c current IEflows from the

Question # 6

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

Question # 7

SI unit of impedance is

Question # 8

The alternative voltage of current is actually measured by:

Question # 9

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

Question # 10

A P-N juction or semiconductor diode cannot be used as

Question # 11

The value of output resistance of OP-AMOP is of the order of

Question # 12

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 # 13

In a transistor, the central region is called

Question # 14

The total reactance of a series RLC circuit at resonance is

Question # 15

When electrons in the transmitting antenna vibrate 94000 time per second, they produce radiowaves having frequency

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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 magnitude of alternative voltage V:
A. Always increase
B. Always decrease
C. Remains constant
D. Does not remain constant
3 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
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 The circuit which is used to smooth the output voltage of the full-wave rectification is known as
A. transformer
B. rectifier
C. filter
D. none of these
6 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
7 The impedance of RLC series resonance circuit at resonant frequency is
A. Greater than R
B. Equal to R
C. Less than R
D. None of these
8 Electromagnetic waves transmit energy equal to
A. 1/2 mv2
B. moc2
C. hf/c
D. hf
9 In a normally biased n-p-n transistor, an electron c current IEflows from the
A. emitter into the base
B. collector into the base
C. base into collector
D. none of these
10 In n-p-n transistor, emitter base junction is kept
A. reversed
B. forward biased
C. may be reversed or may be forward biased
D. none of these

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