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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
The r.m.s. value of alternating current is equal to its maximum value at angle of
Question # 2
When either L or C is increased, the resonant frequency of the RLC series circuit
Question # 3
In n-p-n transistor, emitter base junction is kept
Question # 4
Which of the following diodes can operate in the reverse biased condition
Question # 5
The average of A.C. current and voltage over a complete cycle is
Question # 6
Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:
Question # 7
The entire wave form of sinusoidal voltage is actually a set of all the:
Question # 8
An A.C. voltmeter read 250 volts. The frequency of alternating is 50 Hz, the peak value of voltage is
Question # 9
The bridge circuit of full wave rectification uses
Question # 10
The R1= infinity and R2= 0, then the gain of non-inverting amplifier is
Question # 11
For normal operation of transistor, the batteries
Question # 12
The time interval during which the Voltage source changes its polarity once is known as:
Question # 13
Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length
Question # 14
The length of rotating vector (on a certain scale) represents the:
Question # 15
In describing functions of digital systems, a closed switch will be shown as
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Q Qura-tul-Ain Ansari 13 - Mar - 2023 06 Min 42 Sec 60/60 -
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M Muhammad Rizwan 11 - Jul - 2022 02 Min 39 Sec 45/60 -
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M Muqadas Zahra 13 - Apr - 2022 14 Min 05 Sec 40/60 -
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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 | A P-N juction or semiconductor diode cannot be used as |
A. A rectifier
B. Detector
C. Oscillator
D. An amplifier
|
| 2 | In n-p-n transistor, emitter base junction is kept |
A. reversed
B. forward biased
C. may be reversed or may be forward biased
D. none of these
|
| 3 | Electromagnetic waves transmit energy equal to |
A. 1/2 mv2
B. moc2
C. hf/c
D. hf
|
| 4 | In an A.C circuit with resistor only, the current and voltage have a phase angle of |
A. 90°
B. 0°
C. 180°
D. none of these
|
| 5 | If the value of C in a series RLC circuit is increased, the resonant frequency |
A. Is not affected
B. Increase
C. Remains the same
D. Decreases
|
| 6 | Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is |
A. zero
B. small
C. large
D. very large
|
| 7 | A sinusoidally alternating voltage or current can be graphically represented by a: |
A. Vector
B. Rotating vector
C. Clockwise vector
D. Anticlockwise voltage vector
|
| 8 | The wave form of alternating voltage is the graph between: |
A. Voltage across X-axis and time across y-axis
B. Current and time
C. Voltage along y-axis and time along x-axis
D. Voltage and current
|
| 9 | When either L or C is increased, the resonant frequency of the RLC series circuit |
A. Increases
B. Decreases
C. Remains the same
D. Becomes zero
|
| 10 | 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 |
A. 2nd group
B. fourth group
C. fifth group
D. sixth group
|
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