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

Alternating current is produced by a voltage source which polarity:

Question # 2

Alternating current can be transmitted:

Question # 3

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

Question # 4

Alternating current can induce voltage because it has a

Question # 5

For normal operation of transistor, the batteries

Question # 6

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

Question # 7

The alternative voltage of current is actually measured by:

Question # 8

In which of the following diodes when an electron combines with a hole during the forward biasing, photon of visible light is emitted.

Question # 9

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

Question # 10

At resonance frequency the impedance of parallel resonance circuit is

Question # 11

In free space, the speed of electromagnetic waves is

Question # 12

The time interval during which the Voltage source changes its polarity once is known as:

Question # 13

Nowadays, Most of the electric energy is produced by the A.C. generators using:

Question # 14

For the normal operation of the transistor, its

Question # 15

The amplifier which us used to perform mathematical operations electronically is known as

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 In a transistor, if the central region is p-type then this type of transistor is known as
A. p-n-p transistor
B. n-p-n transistor
C. either of these
D. none of these
4 The sum of positive and negative peak values is called:
A. Instantaneous value
B. Peak value
C. Rms valuie
D. Peak-to peak-value
5 An A.C varies as a function of
A. Current
B. Voltage
C. Time
D. Charge
6 The length of rotating vector (on a certain scale) represents the:
A. Peak value of alternating quantity
B. RMS value of alternating quantity
C. Instantaneous value of alternating quantity
D. Either (B) or (C)
7 When electrons in the transmitting antenna vibrate 94000 time per second, they produce radiowaves having frequency
A. 9.4 kHz
B. 940 kHz
C. 94 kHz
D. None of these
8 Which of the following diode is used for the detection of light
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. all of them
9 The bridge circuit of full wave rectification uses
A. one diode
B. two diode
C. three diode
D. four diode
10 In which of the following diodes when an electron combines with a hole during the forward biasing, photon of visible light is emitted.
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. all of them

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