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 free space, the speed of electromagnetic waves is

Question # 2

The basic circuit elements of A.C circuit are

Question # 3

Electromagnetic waves transmit energy equal to

Question # 4

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

Question # 5

The total reactance of a series RLC circuit at resonance is

Question # 6

For the normal operation of the transistor, its

Question # 7

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

Question # 8

An A.C. voltmeter read 250 volts. The frequency of alternating is 50 Hz, the peak value of voltage is

Question # 9

Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is

Question # 10

During the positive half-cycle in the half-wave rectification,the diode

Question # 11

Chock consumes externally small

Question # 12

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

Question # 13

The R1= infinity and R2= 0, then the gain of non-inverting amplifier is

Question # 14

During each cycle, alternating voltage reaches a peak value

Question # 15

An A.C varies as a function of

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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)
2 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
3 Which of the following diode is used to derive the current in external circuit when light is incident in the circuit
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. none of these
4 The open loop gain of OP-AMP is of the order of
A. 102
B. 103
C. 104
D. 105
5 A digital system deals with quantities or variables which have
A. only one state
B. only two discrete states
C. three discrete states
D. four discrete states
6 OP-AMP has the following input terminals
A. one
B. two
C. three
D. four
7 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
8 The power factor of resonant series circuit is
A. 1
B. 0
C. -1
D. 0.5
9 Nowadays, Most of the electric energy is produced by the A.C. generators using:
A. Hydal water
B. Geothermal energy
C. Solar energy
D. Biomass
10 In series RC circuit when R=Xc, then the phase angle is
A. 0°
B. 90°
C. 70°
D. 45°

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