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 basic circuit elements of A.C circuit are

Question # 2

The most common source of alternating voltage is:

Question # 3

The alternative voltage of current is actually measured by:

Question # 4

If the value of C in a series RLC circuit is increased, the resonant frequency

Question # 5

The wave form of alternating voltage is the graph between:

Question # 6

The magnitude of alternative voltage V:

Question # 7

For normal operation of transistor, the batteries

Question # 8

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 # 9

An A.C varies as a function of

Question # 10

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

Question # 11

The RMS value of alternating current is:

Question # 12

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

Question # 13

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

Question # 14

Which of the following diode is used to derive the current in external circuit when light is incident in the circuit

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 When the emitter-base junction of a transistor is reverse biased, collector current
A. Reverses
B. Increases
C. Decreases
D. Stops
3 Which one of the following is correct?
A. Vo= 1.414 Vrms
B. Iams= 1.414 Io
C. VO = 10.70 Vrms
D. Both a and b
4 The basic circuit element in A.C. circuits are:
A. Resistor and capacitor
B. Resistor and Inductor
C. Capacitor only
D. Both (B) and (C)
5 In a transistor, the central region is called
A. collector
B. emitter
C. base
D. none of them
6 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
A. 2nd group
B. fourth group
C. fifth group
D. sixth group
7 In frequency modulation (FM), the carrier waves amplitude
A. Remains constant
B. Increase
C. Decreases
D. None of these
8 An A.C. voltmeter read 250 volts. The frequency of alternating is 50 Hz, the peak value of voltage is
A. 3525.0 volts
B. 35.35 volts
C. 353.5 volts
D. 3.535 volts
9 The output voltage of half wave rectification is in the form of
A. a smooth curve
B. a smooth wave
C. pulses
D. all of the above
10 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

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