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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 series RC circuit when R=Xc, then the phase angle is
Question # 2
The most common source of alternating voltage is:
Question # 3
Which of the following diode is used for the detection of light
Question # 4
When the p-n junction is forward biased its resistance is of the order of
Question # 5
Alternating current is produced by a voltage source which polarity:
Question # 6
A signal appears after amplification, at the output terminal with a phase shift of 180° , if it is applied at
Question # 7
The output voltage of half wave rectification is in the form of
Question # 8
Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length
Question # 9
The basic circuit element in A.C. circuits are:
Question # 10
Mathematical manipulation of the two quantized states can be best carried if they are represented by
Question # 11
In an A.C circuit with resistor only, the current and voltage have a phase angle of
Question # 12
The Instantaneous value of alternative current maybe:
Question # 13
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
Question # 14
If the value of C in a series RLC circuit is increased, the resonant frequency
Question # 15
The r.m.s. value of alternating current is equal to its maximum value at angle of
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 -
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 -
M musman shahid 03 - Jun - 2024 02 Min 53 Sec 30/60
ECAT Physics Chapter 16 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | When the pn-junction is connected reversed biased, its resistance is of the order of |
A. few ohms
B. few kilo-ohms
C. few mega-ohms
D. few mili-ohms
|
| 2 | When electrons in the transmitting antenna vibrate 94000 time per second, they produce radiowaves having frequency |
A. 9.4 kHz
B. 940 kHz
C. 94 kHz
D. None of these
|
| 3 | Which of the following diode is used for the detection of light |
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. all of them
|
| 4 | Conversion of alternating current into direct current is called |
A. amplification
B. rectification
C. conduction
D. polarization
|
| 5 | In series RC circuit when R=Xc, then the phase angle is |
A. 0°
B. 90°
C. 70°
D. 45°
|
| 6 | The value of the potential difference across the depletion region for the case of germanium is |
A. 0.3 V
B. 0.5 V
C. 0.7 V
D. 0.9 V
|
| 7 | Which of the following diodes can operate in the reverse biased condition |
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. none of these
|
| 8 | Which of the following diode is used to derive the current in external circuit when light is incident in the circuit |
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. none of these
|
| 9 | When the emitter-base junction of a transistor is reverse biased, collector current |
A. Reverses
B. Increases
C. Decreases
D. Stops
|
| 10 | An A.C varies as a function of |
A. Current
B. Voltage
C. Time
D. Charge
|
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