ECAT Pre Computer Science Chapter 16 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 16 Alternating Current

Try The MCQ's Test For ECAT Physics Chapter 16 Alternating Current

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ECAT Physics Chapter 16 Alternating Current

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Question # 1

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

Question # 2

In a normally biased n-p-n transistor, an electron c current IEflows from the

Question # 3

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

Question # 4

Which one of the following waves belongs to electromagnetic spectrum

Question # 5

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 # 6

SI unit of impedance is

Question # 7

Which of the following diode is used for the detection of light

Question # 8

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

Question # 9

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

Question # 10

An A.C varies as a function of

Question # 11

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

Question # 12

The value of current gain of n-p-n transistor is of the order of

Question # 13

The alternative voltage of current is actually measured by:

Question # 14

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

Question # 15

To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 If the value of C in a series RLC circuit is increased, the resonant frequency
A. Is not affected
B. Increase
C. Remains the same
D. Decreases
2 The impedance of RLC series resonance circuit at resonant frequency is
A. Greater than R
B. Equal to R
C. Less than R
D. None of these
3 The amplifier which us used to perform mathematical operations electronically is known as
A. calculator
B. OP-AMP
C. computer
D. any one of them
4 An A.C varies as a function of
A. Current
B. Voltage
C. Time
D. Charge
5 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
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 Average value of A.C voltage during one cycle is
A. 1
B. Zero
C. Maximum
D. Variable
8 Conversion of alternating current into direct current is called
A. amplification
B. rectification
C. conduction
D. polarization
9 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
10 The magnitude of alternative voltage V:
A. Always increase
B. Always decrease
C. Remains constant
D. Does not remain constant

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