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

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

Question # 2

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

Question # 3

The phase angle of a series RLC circuit at resonance is

Question # 4

At resonance, the impedance of RLC series circuit is

Question # 5

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

Question # 6

If we connected the ordinary DC ammeter to measure alternating current, it would measure its:

Question # 7

Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:

Question # 8

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

Question # 9

An A.C varies as a function of

Question # 10

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

Question # 11

Electromagnetic waves transmit energy equal to

Question # 12

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

Question # 13

A changing magnetic flux creates around itself

Question # 14

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 # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 During the negative half-cycle of the half-wave rectification, the diode
A. does not conduct
B. conducts
C. either of these
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 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
4 In RLC series circuit, resonance occurs when
A. XL > Xc
B. XL < Xc
C. XL = Xc
D. None of these
5 Chock consumes externally small
A. Charge
B. Current
C. Power
D. Potential
6 Electromagnetic waves transmit energy equal to
A. 1/2 mv2
B. moc2
C. hf/c
D. hf
7 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
8 If we connect a A.C. volt meter to read A.C. voltage, It would read its:
A. RMS value
B. Instantaneous value
C. Valued average over a cycle
D. Zero
9 The basic circuit element in D.C. circuit is:
A. A capacitor
B. A resistor
C. An inductor
D. Both (A) and (C)
10 The average of A.C. current and voltage over a complete cycle is
A. Maximum
B. zero
C. Neither zero nor maximum
D. None of these

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