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

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

Question # 2

Transmitting antenna emits

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

In series RC circuit when R=Xc, then the phase angle is

Question # 7

Electromagnetic waves transmit energy equal to

Question # 8

A signal is amplified at the output without any change of phase, if it is applied at the

Question # 9

The basic circuit elements of A.C circuit are

Question # 10

To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance

Question # 11

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

Question # 12

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

Question # 13

A resonance curve for RLC series circuit is a plot of frequency versus

Question # 14

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

Question # 15

The value of the potential difference across the depletion region for the case of germanium is

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 Peak value of alternative current is:
A. one of its Instantaneous value
B. Equal to its RMS value
C. The same as its peak-to-peak value
D. Both (B) and (C)
2 When the pn-junction is forward biased. the current flows through it is of the order of
A. mili-amperes
B. amperes
C. nano-amperes
D. micro-amperes
3 A P-N juction or semiconductor diode cannot be used as
A. A rectifier
B. Detector
C. Oscillator
D. An amplifier
4 When the p-n junction is forward biased its resistance is of the order of
A. few mega ohms
B. few kilo ohms
C. few ohms
D. few milli ohms
5 A diode characteristic curve is a plot between
A. current and time
B. voltage and time
C. voltage and current
D. forward voltage and reversed voltage
6 In describing functions of digital systems, a closed switch will be shown as
A. 0
B. 1
C. low
D. any one of these
7 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
8 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
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 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

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