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

When either L or C is increased, the resonant frequency of the RLC series circuit

Question # 2

If 250V is the RMS value of alternative voltage, then its peak value Vowill be:

Question # 3

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

Question # 4

The phase angle of a series RLC circuit at resonance is

Question # 5

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

Question # 6

At resonance, the impedance of RLC series circuit is

Question # 7

The waveform of alternating voltage is a:

Question # 8

When the pn-junction is in reversed biased, current flows through the junction due to the

Question # 9

In a transistor, the central region is called

Question # 10

The output voltage of half wave rectification is in the form of

Question # 11

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

Question # 12

An A.C. voltage is applied across the inductor. When the frequency of the voltage is increased, the current

Question # 13

A digital system deals with quantities or variables which have

Question # 14

An A.C varies as a function of

Question # 15

The total reactance of a series RLC circuit at resonance is

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The alternative voltage of current is actually measured by:
A. Its RMS value
B. Square root of its mean square value
C. Instantaneous value
D. Peak value
2 A P-N juction or semiconductor diode cannot be used as
A. A rectifier
B. Detector
C. Oscillator
D. An amplifier
3 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
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 The sum of positive and negative peak values is called:
A. Instantaneous value
B. Peak value
C. Rms valuie
D. Peak-to peak-value
6 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
7 In RLC series circuit, resonance occurs when
A. XL > Xc
B. XL < Xc
C. XL = Xc
D. None of these
8 In half wave rectification
A. both halves of the input voltage is used
B. only one half of the input voltage is used
C. either of these
D. none of these
9 Which of the following diodes can operate in the reverse biased condition
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. none of these
10 If 250V is the RMS value of alternative voltage, then its peak value Vowill be:
A. 353.5V
B. 250V
C. 175V
D. zero

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