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 series RC circuit when R=Xc, then the phase angle is

Question # 2

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

Question # 3

Alternating current can be transmitted:

Question # 4

Most OP-AMP operates with

Question # 5

The alternative voltage of current is actually measured by:

Question # 6

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

Question # 7

The bridge circuit of full wave rectification uses

Question # 8

During the negative half-cycle of the half-wave rectification, the diode

Question # 9

The power factor of resonant series circuit is

Question # 10

The phase angle of a series RLC circuit at resonance is

Question # 11

A digital system deals with quantities or variables which have

Question # 12

A sinusoidally alternating voltage or current can be graphically represented by a:

Question # 13

In an A.C circuit with resistor only, the current and voltage have a phase angle of

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The Instantaneous value of alternative current maybe:
A. The same as its RMS value
B. Greater than its Rms value
C. The same as its peak value
D. Any of these
2 A resonance curve for RLC series circuit is a plot of frequency versus
A. Voltage
B. Current
C. Impedance
D. Reactance
3 In series RC circuit when R=Xc, then the phase angle is
A. 0°
B. 90°
C. 70°
D. 45°
4 The total reactance of a series RLC circuit at resonance is
A. zero
B. Equal to the resistance
C. Infinity
D. Capacitive
5 Electromagnetic waves transmit energy equal to
A. 1/2 mv2
B. moc2
C. hf/c
D. hf
6 In describing functions of digital systems, a closed switch will be shown as
A. 0
B. 1
C. low
D. any one of these
7 In free space, the speed of electromagnetic waves is
A. 3 x 108ms-1
B. 3 x 106ms-1
C. 4 x 107ms-1
D. 3 x 109ms-1
8 In which of the following components, pn-junction is used
A. light emitting diode
B. photo diode
C. photo voltaic cell
D. all of these
9 OP-AMP has the following input terminals
A. one
B. two
C. three
D. four
10 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

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