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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
To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance
Question # 2
A signal is amplified at the output without any change of phase, if it is applied at the
Question # 3
A changing magnetic flux creates around itself
Question # 4
During the positive half-cycle in the half-wave rectification,the diode
Question # 5
The length of rotating vector (on a certain scale) represents the:
Question # 6
At resonance, the phase angle for RLC series resonance circuit equals
Question # 7
The wave form of alternating voltage is the graph between:
Question # 8
The phase angle of a series RLC circuit at resonance is
Question # 9
Peak value of alternative current is:
Peak value of alternative current is:
Question # 10
The alternative voltage of current is actually measured by:
Question # 11
SI unit of impedance is
Question # 12
A signal appears after amplification, at the output terminal with a phase shift of 180° , if it is applied at
Question # 13
Alternating current can induce voltage because it has a
Question # 14
The value of the input resistance of OP-AMP is of the order of
Question # 15
In describing functions of digital systems, a closed switch will be shown as
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 -
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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 | In series RC circuit when R=Xc, then the phase angle is |
A. 0°
B. 90°
C. 70°
D. 45°
|
| 2 | The power factor of resonant series circuit is |
A. 1
B. 0
C. -1
D. 0.5
|
| 3 | The impedance of RLC series resonance circuit at resonant frequency is |
A. Greater than R
B. Equal to R
C. Less than R
D. None of these
|
| 4 | The RMS value of alternating current is: |
A. 0.7 times at the peak value
B. 0.5 times the peak value
C. 0.7 times the Instantaneous value
D. Equal to maximum voltage
|
| 5 | The highest value reached by the voltage or current: |
A. In quarter cycle is called Instantaneous value
B. In half cycle is called peak-to-peak value
C. In one cycle is called peak value
D. In half cycle is called Instantaneous value
|
| 6 | 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 |
A. base and emitter
B. collector and emitter
C. base and collector
D. any one of these
|
| 7 | 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
|
| 8 | In RLC series circuit, resonance occurs when |
A. XL > Xc
B. XL < Xc
C. XL = Xc
D. None of these
|
| 9 | In a transistor, the central region is called |
A. collector
B. emitter
C. base
D. none of them
|
| 10 | 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
|
Test Questions
Share your comments & questions here
Iiqra Fatima
25 May 2018You should let us practice difficult mcqs ..These are too easy for ECAT level....Thanku