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

Question # 2

At resonance frequency the impedance of parallel resonance circuit is

Question # 3

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

Question # 4

In a normally biased n-p-n transistor, an electron c current IEflows from the

Question # 5

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

Question # 6

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

Question # 7

The closed loop gain of the inverting amplifier is written as

Question # 8

The wave form of alternating voltage is the graph between:

Question # 9

In a transistor, the central region is called

Question # 10

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

Question # 11

Alternating current is produced by a voltage source which polarity:

Question # 12

The sum of positive and negative peak values is called:

Question # 13

The basic circuit element in D.C. circuit is:

Question # 14

A digital system deals with quantities or variables which have

Question # 15

A diode characteristic curve is a plot between

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 OP-AMP has the following input terminals
A. one
B. two
C. three
D. four
2 In series RC circuit when R=Xc, then the phase angle is
A. 0°
B. 90°
C. 70°
D. 45°
3 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
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 In which of the following components, pn-junction is used
A. light emitting diode
B. photo diode
C. photo voltaic cell
D. all of these
6 In a transistor, the central region is called
A. collector
B. emitter
C. base
D. none of them
7 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
8 The phase angle of a series RLC circuit at resonance is
A. 180°
B. 90°
C. 0°
D. None of the these
9 Which one of the following waves belongs to electromagnetic spectrum
A. Radio and TV waves
B. Radar waves
C. Micro waves
D. All of them
10 An A.C. voltmeter read 250 volts. The frequency of alternating is 50 Hz, the peak value of voltage is
A. 3525.0 volts
B. 35.35 volts
C. 353.5 volts
D. 3.535 volts

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