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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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Total Questions15
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Time Allowed20
Physics ECAT Pre Engineering Chapter 16 Alternating Current
00:00
Question # 1
SI unit of impedance is
Question # 2
The sum of positive and negative peak values is called:
Question # 3
An A.C. voltage is applied across the inductor. When the frequency of the voltage is increased, the current
Question # 4
In a transistor, if the central region is n-type, then this type of transistor is known as
Question # 5
The phase angle of a series RLC circuit at resonance is
Question # 6
Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length
Question # 7
The bridge circuit of full wave rectification uses
Question # 8
The most common source of alternating voltage is:
Question # 9
At resonance, the impedance of RLC series circuit is
Question # 10
In free space, the speed of electromagnetic waves is
Question # 11
A sinusoidally alternating voltage or current can be graphically represented by a:
Question # 12
A changing magnetic flux creates around itself
Question # 13
When the pn-junction is forward biased. the current flows through it is of the order of
Question # 14
The value of output resistance of OP-AMOP is of the order of
Question # 15
In which of the following components, pn-junction is used
Prepare Complete Set Wise Physics ECAT Pre Engineering Chapter 16 Alternating Current MCQs Online With Answers
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ECAT Physics Chapter 16 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | In RLC series circuit, resonance occurs when |
A. XL > Xc
B. XL < Xc
C. XL = Xc
D. None of these
|
| 2 | 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
|
| 3 | The R1= infinity and R2= 0, then the gain of non-inverting amplifier is |
A. zero
B. infinity
C. one
D. any one of these
|
| 4 | 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
|
| 5 | 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
|
| 6 | The closed loop gain of the inverting amplifier is written as |
A. G = R2/R1
B. G = 1 + R2/R1
C. G = -R2/R1
D. G = 1 - R2/R1
|
| 7 | 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
|
| 8 | Which one of the following waves belongs to electromagnetic spectrum |
A. Radio and TV waves
B. Radar waves
C. Micro waves
D. All of them
|
| 9 | Mathematical manipulation of the two quantized states can be best carried if they are represented by |
A. high - low
B. yes - no
C. on - off
D. 0 - 1
|
| 10 | The bridge circuit of full wave rectification uses |
A. one diode
B. two diode
C. three diode
D. four diode
|
Test Questions