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

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

Question # 2

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

Question # 3

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

Question # 4

The length of rotating vector (on a certain scale) represents the:

Question # 5

During the positive half-cycle in the half-wave rectification,the diode

Question # 6

The highest value reached by the voltage or current:

Question # 7

An A.C varies as a function of

Question # 8

At resonance, the impedance of RLC series circuit is

Question # 9

The wave form of alternating voltage is the graph between:

Question # 10

A p-n junction is formed when a crystal of silicon is growth in such a way that its one half is doped with trivalent impurity and the other half with a impurity from

Question # 11

During each cycle, alternating voltage reaches a peak value

Question # 12

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

Question # 13

The circuit which is used to smooth the output voltage of the full-wave rectification is known as

Question # 14

For the normal operation of the transistor, its

Question # 15

The alternative voltage of current is actually measured by:

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is
A. zero
B. small
C. large
D. very large
2 Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:
A. Peak value
B. RMS value
C. Instantaneous value
D. Peak-to-peak value
3 The power factor of resonant series circuit is
A. 1
B. 0
C. -1
D. 0.5
4 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
5 At higher frequency of the alternating current, the capacitive reactance Xc
A. Increases
B. Decreases
C. Remains the same
D. Increases only when the voltage increases
6 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
7 A changing magnetic flux creates around itself
A. An electromotive force
B. An electric field (changing electric flux)
C. Magnetic field
D. None of the above
8 Chock consumes externally small
A. Charge
B. Current
C. Power
D. Potential
9 An A.C varies as a function of
A. Current
B. Voltage
C. Time
D. Charge
10 The average of A.C. current and voltage over a complete cycle is
A. Maximum
B. zero
C. Neither zero nor maximum
D. None of these

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