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

Question # 2

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

Question # 3

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

Question # 4

In which of the following components, pn-junction is used

Question # 5

The most common source of alternating voltage is:

Question # 6

A diode characteristic curve is a plot between

Question # 7

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

Question # 8

A sinusoidally alternating voltage or current can be graphically represented by a:

Question # 9

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

Question # 10

At resonance frequency the impedance of parallel resonance circuit is

Question # 11

If we connected the ordinary DC ammeter to measure alternating current, it would measure its:

Question # 12

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

Question # 13

Transmitting antenna emits

Question # 14

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

Question # 15

Which one of the following is correct?

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The wave form of alternating voltage is the graph between:
A. Voltage across X-axis and time across y-axis
B. Current and time
C. Voltage along y-axis and time along x-axis
D. Voltage and current
2 In free space, the speed of electromagnetic waves is
A. 3 x 108ms-1
B. 3 x 106ms-1
C. 4 x 107ms-1
D. 3 x 109ms-1
3 When the pn-junction is connected reversed biased, its resistance is of the order of
A. few ohms
B. few kilo-ohms
C. few mega-ohms
D. few mili-ohms
4 When the pn-junction is in reversed biased, current flows through the junction due to the
A. majority carriers
B. minority carriers
C. either of them
D. none of them
5 OP-AMP has the following input terminals
A. one
B. two
C. three
D. four
6 When electrons in the transmitting antenna vibrate 94000 time per second, they produce radiowaves having frequency
A. 9.4 kHz
B. 940 kHz
C. 94 kHz
D. None of these
7 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
A. base and emitter
B. collector and emitter
C. base and collector
D. any one of these
8 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
9 The R1= infinity and R2= 0, then the gain of non-inverting amplifier is
A. zero
B. infinity
C. one
D. any one of these
10 For a n-p-n transistor, the conventional current equation can be written as
A. IE+ IC= IB
B. IC- IB= IE
C. IC+ IB= IE
D. IB+ IE= IC

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