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MCQ's Test For ECAT Physics Chapter 16 Alternating Current
Try The MCQ's Test For ECAT Physics Chapter 16 Alternating Current
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Total Questions15
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Time Allowed20
ECAT Physics Chapter 16 Alternating Current
00:00
Question # 1
In which of the following components, pn-junction is used
Question # 2
The sum of positive and negative peak values is called:
Question # 3
Mathematical manipulation of the two quantized states can be best carried if they are represented by
Question # 4
In free space, the speed of electromagnetic waves is
Question # 5
When electrons in the transmitting antenna vibrate 94000 time per second, they produce radiowaves having frequency
Question # 6
Electromagnetic waves transmit energy equal to
Question # 7
The output voltage of half wave rectification is in the form of
Question # 8
In a transistor, the central region is called
Question # 9
At higher frequency of the alternating current, the capacitive reactance Xc
Question # 10
The total reactance of a series RLC circuit at resonance is
Question # 11
An A.C. voltmeter read 250 volts. The frequency of alternating is 50 Hz, the peak value of voltage is
Question # 12
In which of the following diodes when an electron combines with a hole during the forward biasing, photon of visible light is emitted.
Question # 13
Conversion of alternating current into direct current is called
Question # 14
The most common source of alternating voltage is:
Question # 15
The bridge circuit of full wave rectification uses
Top Scorers Of ECAT Physics Chapter 16 Alternating Current MCQ`s Test
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S Sana Hashim 20 - May - 2022 00 Min 05 Sec 60/60 -
A Anayat Ali 26 - Mar - 2024 00 Min 06 Sec 60/60 -
H Heer 02 - Jan - 2024 00 Min 42 Sec 60/60 -
Q Qura-tul-Ain Ansari 13 - Mar - 2023 06 Min 42 Sec 60/60 -
A Abdullah Baloch 02 - Aug - 2024 02 Min 33 Sec 55/60 -
A Alishba Farooq 09 - Mar - 2024 16 Min 16 Sec 55/60 -
D dark goblin 19 - Jul - 2024 00 Min 39 Sec 50/60 -
S suzi 10 - Feb - 2026 01 Min 47 Sec 48/60 -
M Muhammad Rizwan 11 - Jul - 2022 02 Min 39 Sec 45/60 -
S Sarmad 18 - Jun - 2022 07 Min 03 Sec 45/60 -
H HAMZA Shah 20 - Sep - 2021 01 Min 11 Sec 40/60 -
M Muqadas Zahra 13 - Apr - 2022 14 Min 05 Sec 40/60 -
S Shaeel Fatima 24 - Feb - 2023 01 Min 10 Sec 35/60 -
T tehreemnadeem 11 - Jul - 2022 04 Min 13 Sec 35/60 -
M Muhammad Muzammil 11 - Mar - 2024 02 Min 14 Sec 30/60
ECAT Physics Chapter 16 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | The circuit which is used to smooth the output voltage of the full-wave rectification is known as |
A. transformer
B. rectifier
C. filter
D. none of these
|
| 2 | Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean: |
A. Peak value
B. RMS value
C. Instantaneous value
D. Peak-to-peak value
|
| 3 | A signal appears after amplification, at the output terminal with a phase shift of 180° , if it is applied at |
A. inverting input
B. non-inverting input
C. any one of the input terminal
D. none of them
|
| 4 | Conversion of alternating current into direct current is called |
A. amplification
B. rectification
C. conduction
D. polarization
|
| 5 | For the normal operation of the transistor, its |
A. emitter-base and collector base junctions are forward biased
B. emitter-base junction is reversed biased and collector base junction is forward biased
C. emitter-base junction is forward biased and collector-base junction is reverse biased
D. any one of these
|
| 6 | In frequency modulation (FM), the carrier waves amplitude |
A. Remains constant
B. Increase
C. Decreases
D. None of these
|
| 7 | The open loop gain of OP-AMP is of the order of |
A. 102
B. 103
C. 104
D. 105
|
| 8 | SI unit of impedance is |
A. hertz
B. henry
C. ampere
D. ohms
|
| 9 | An A.C varies as a function of |
A. Current
B. Voltage
C. Time
D. Charge
|
| 10 | Chock consumes externally small |
A. Charge
B. Current
C. Power
D. Potential
|
Test Questions