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

In RLC series circuit, resonance occurs when

Question # 2

For normal operation of transistor, the batteries

Question # 3

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

Question # 4

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

Question # 5

At higher frequency of the alternating current, the capacitive reactance Xc

Question # 6

A P-N juction or semiconductor diode cannot be used as

Question # 7

A signal appears after amplification, at the output terminal with a phase shift of 180° , if it is applied at

Question # 8

The r.m.s. value of alternating current is equal to its maximum value at angle of

Question # 9

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

Question # 10

Which of the following diode is used to derive the current in external circuit when light is incident in the circuit

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

Electromagnetic waves transmit energy equal to

Question # 15

In a transistor, if the central region is n-type, then this type of transistor is known as

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 In frequency modulation (FM), the carrier waves amplitude
A. Remains constant
B. Increase
C. Decreases
D. None of these
2 For the normal operation of the transistor, its
A. emitter-base and collector base junctions are forward biased
B. emitter-base junction is reversed biased and collector base junction is forward biased
C. emitter-base junction is forward biased and collector-base junction is reverse biased
D. any one of these
3 The closed loop gain of the non-inverting amplifier is given by
A. G = R2/R1
B. G = -R2/R1
C. G = 1 - R2/R1
D. G = 1 + T2/R1
4 Chock consumes externally small
A. Charge
B. Current
C. Power
D. Potential
5 The value of the input resistance of OP-AMP is of the order of
A. few ohms
B. few hundred ohms
C. several kilo ohms
D. several maga ohms
6 If we connected the ordinary DC ammeter to measure alternating current, it would measure its:
A. Instantaneous value
B. RMS value
C. Value averaged over a cycle
D. Either (B) or (C)
7 The closed loop gain of the inverting amplifier is written as
A. G = R2/R1
B. G = 1 + R2/R1
C. G = -R2/R1
D. G = 1 - R2/R1
8 The waveform of alternating voltage is a:
A. Square
B. Rectangular
C. Saw-tooth
D. Sinusoidal
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 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

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