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

The average of A.C. current and voltage over a complete cycle is

Question # 2

Chock consumes externally small

Question # 3

OP-AMP has the following input terminals

Question # 4

The most common source of alternating voltage is:

Question # 5

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

Question # 6

When the pn-junction is forward biased. the current flows through it is of the order of

Question # 7

In free space, the speed of electromagnetic waves is

Question # 8

The wave form of alternating voltage is the graph between:

Question # 9

SI unit of impedance is

Question # 10

Electromagnetic waves transmit energy equal to

Question # 11

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

Question # 12

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

Question # 13

Alternating current can be transmitted:

Question # 14

Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length

Question # 15

The length of rotating vector (on a certain scale) represents the:

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The basic circuit elements of A.C circuit are
A. Resistor
B. Inductor
C. Capacitor
D. All the three
2 The total reactance of a series RLC circuit at resonance is
A. zero
B. Equal to the resistance
C. Infinity
D. Capacitive
3 Chock consumes externally small
A. Charge
B. Current
C. Power
D. Potential
4 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
5 Alternating current can induce voltage because it has a
A. High peak value
B. Varying magnetic field
C. Stronger field than direct curren
D. Constant magnetic field
6 A sinusoidally alternating voltage or current can be graphically represented by a:
A. Vector
B. Rotating vector
C. Clockwise vector
D. Anticlockwise voltage vector
7 In frequency modulation (FM), the carrier waves amplitude
A. Remains constant
B. Increase
C. Decreases
D. None of these
8 Average value of A.C voltage during one cycle is
A. 1
B. Zero
C. Maximum
D. Variable
9 Electromagnetic waves transmit energy equal to
A. 1/2 mv2
B. moc2
C. hf/c
D. hf
10 The basic circuit element in D.C. circuit is:
A. A capacitor
B. A resistor
C. An inductor
D. Both (A) and (C)

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