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 RLC series circuit, resonance occurs when

Question # 2

The bridge circuit of full wave rectification uses

Question # 3

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 # 4

Alternating current is produced by a voltage source which polarity:

Question # 5

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

Question # 6

The wave form of alternating voltage is the graph between:

Question # 7

In a transistor, the central region is called

Question # 8

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

Question # 9

SI unit of impedance is

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

The open loop gain of OP-AMP is of the order of

Question # 14

The output voltage of half wave rectification is in the form of

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 Peak value of alternative current is:
A. one of its Instantaneous value
B. Equal to its RMS value
C. The same as its peak-to-peak value
D. Both (B) and (C)
2 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
3 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
4 In a normally biased n-p-n transistor, an electron c current IEflows from the
A. emitter into the base
B. collector into the base
C. base into collector
D. none of these
5 The value of output resistance of OP-AMOP is of the order of
A. few ohms
B. few hundred ohms
C. several kilo ohms
D. several mega ohms
6 A signal is amplified at the output without any change of phase, if it is applied at the
A. inverting input
B. non-inverting input
C. at any of the input
D. none of these
7 Transmitting antenna emits
A. Magnetic waves
B. Electric waves
C. Electromagnetic waves
D. Sound waves
8 In series RC circuit when R=Xc, then the phase angle is
A. 0°
B. 90°
C. 70°
D. 45°
9 In a transistor, the central region is called
A. collector
B. emitter
C. base
D. none of them
10 A diode characteristic curve is a plot between
A. current and time
B. voltage and time
C. voltage and current
D. forward voltage and reversed voltage

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