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 total reactance of a series RLC circuit at resonance is

Question # 2

During the negative half-cycle of the half-wave rectification, the diode

Question # 3

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

Question # 4

If the value of C in a series RLC circuit is increased, the resonant frequency

Question # 5

Average value of A.C voltage during one cycle is

Question # 6

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

Question # 7

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

Question # 8

Chock consumes externally small

Question # 9

Most OP-AMP operates with

Question # 10

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

Question # 11

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

Question # 12

The alternative voltage of current is actually measured by:

Question # 13

OP-AMP has the following input terminals

Question # 14

Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length
A. X-rays
B. Ultraviolet rays
C. y-rays
D. Cosmic rays
3 The basic circuit element in D.C. circuit is:
A. A capacitor
B. A resistor
C. An inductor
D. Both (A) and (C)
4 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
5 Nowadays, Most of the electric energy is produced by the A.C. generators using:
A. Hydal water
B. Geothermal energy
C. Solar energy
D. Biomass
6 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
7 The open loop gain of OP-AMP is of the order of
A. 102
B. 103
C. 104
D. 105
8 A signal is amplified at the output without any change of phase, if it is applied at the
A. inverting input
B. non-inverting input
C. at any of the input
D. none of these
9 Conversion of alternating current into direct current is called
A. amplification
B. rectification
C. conduction
D. polarization
10 In an A.C circuit with resistor only, the current and voltage have a phase angle of
A. 90°
B. 0°
C. 180°
D. none of these

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