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

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

Question # 2

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

Question # 3

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

Question # 4

In frequency modulation (FM), the carrier waves amplitude

Question # 5

Electromagnetic waves transmit energy equal to

Question # 6

In an A.C circuit with resistor only, the current and voltage have a phase angle of

Question # 7

The alternative voltage of current is actually measured by:

Question # 8

In describing functions of digital systems, a closed switch will be shown as

Question # 9

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

Question # 10

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

Question # 11

Conversion of alternating current into direct current is called

Question # 12

When the emitter-base junction of a transistor is reverse biased, collector current

Question # 13

The phase at the positive peak of an A.C. cycle is:

Question # 14

The highest value reached by the voltage or current:

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 An A.C varies as a function of
A. Current
B. Voltage
C. Time
D. Charge
2 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
3 The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its
A. Icwill decrease
B. VCEwill increase
C. ICwill increase
D. VCCwill increase
4 A resonance curve for RLC series circuit is a plot of frequency versus
A. Voltage
B. Current
C. Impedance
D. Reactance
5 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
6 Mathematical manipulation of the two quantized states can be best carried if they are represented by
A. high - low
B. yes - no
C. on - off
D. 0 - 1
7 The waveform of alternating voltage is a:
A. Square
B. Rectangular
C. Saw-tooth
D. Sinusoidal
8 In a transistor, if the central region is p-type then this type of transistor is known as
A. p-n-p transistor
B. n-p-n transistor
C. either of these
D. none of these
9 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
10 An A.C. voltage is applied across the inductor. When the frequency of the voltage is increased, the current
A. Decreases
B. Increases
C. Does not change
D. Momentarily goes to zero

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