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

Question # 2

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

Question # 3

When the p-n junction is forward biased its resistance is of the order of

Question # 4

If we connect a A.C. volt meter to read A.C. voltage, It would read its:

Question # 5

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

Question # 6

Electromagnetic waves transmit energy equal to

Question # 7

In half wave rectification

Question # 8

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

Question # 9

In frequency modulation (FM), the carrier waves amplitude

Question # 10

Conversion of alternating current into direct current is called

Question # 11

The Instantaneous value of alternative current maybe:

Question # 12

The total reactance of a series RLC circuit at resonance is

Question # 13

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

Question # 14

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

Question # 15

Mathematical manipulation of the two quantized states can be best carried if they are represented by

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 In n-p-n transistor, emitter base junction is kept
A. reversed
B. forward biased
C. may be reversed or may be forward biased
D. none of these
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 In a transistor, if the central region is n-type, then this type of transistor is known as
A. n-p-n transistor
B. p-n-p transistor
C. either of these
D. none of these
5 The waveform of alternating voltage is a:
A. Square
B. Rectangular
C. Saw-tooth
D. Sinusoidal
6 OP-AMP has the following input terminals
A. one
B. two
C. three
D. four
7 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
8 In series RC circuit when R=Xc, then the phase angle is
A. 0°
B. 90°
C. 70°
D. 45°
9 Conversion of alternating current into direct current is called
A. amplification
B. rectification
C. conduction
D. polarization
10 In an A.C circuit with resistor only, the current and voltage have a phase angle of
A. 90°
B. 0°
C. 180°
D. none of these

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