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

Question # 2

Which of the following diodes can operate in the reverse biased condition

Question # 3

The value of the potential difference across the depletion region for the case of germanium is

Question # 4

The phase angle of a series RLC circuit at resonance is

Question # 5

The power factor of resonant series circuit is

Question # 6

The basic circuit elements of A.C circuit are

Question # 7

The waveform of alternating voltage is a:

Question # 8

A p-n junction is formed when a crystal of silicon is growth in such a way that its one half is doped with trivalent impurity and the other half with a impurity from

Question # 9

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

Question # 10

The phase at the positive peak of an A.C. cycle is:

Question # 11

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

Question # 12

The entire wave form of sinusoidal voltage is actually a set of all the:

Question # 13

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

Question # 14

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

Question # 15

The input resistance of the OP-AMP is the resistance between the

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 At higher frequency of the alternating current, the capacitive reactance Xc
A. Increases
B. Decreases
C. Remains the same
D. Increases only when the voltage increases
2 When the pn-junction is forward biased. the current flows through it is of the order of
A. mili-amperes
B. amperes
C. nano-amperes
D. micro-amperes
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 When the emitter-base junction of a transistor is reverse biased, collector current
A. Reverses
B. Increases
C. Decreases
D. Stops
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
A. base and emitter
B. collector and emitter
C. base and collector
D. any one of these
6 The power factor of resonant series circuit is
A. 1
B. 0
C. -1
D. 0.5
7 The total reactance of a series RLC circuit at resonance is
A. zero
B. Equal to the resistance
C. Infinity
D. Capacitive
8 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
9 A changing magnetic flux creates around itself
A. An electromotive force
B. An electric field (changing electric flux)
C. Magnetic field
D. None of the above
10 The basic circuit elements of A.C circuit are
A. Resistor
B. Inductor
C. Capacitor
D. All the three

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