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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 a transistor, if the central region is p-type then this type of transistor is known as
Question # 2
An A.C varies as a function of
Question # 3
The basic circuit element in D.C. circuit is:
Question # 4
Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:
Question # 5
Mathematical manipulation of the two quantized states can be best carried if they are represented by
Question # 6
For a n-p-n transistor, the conventional current equation can be written as
Question # 7
The r.m.s. value of alternating current is equal to its maximum value at angle of
Question # 8
Most OP-AMP operates with
Question # 9
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 # 10
The time interval during which the Voltage source changes its polarity once is known as:
Question # 11
The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its
Question # 12
Alternating current is produced by a voltage source which polarity:
Question # 13
A resonance curve for RLC series circuit is a plot of frequency versus
Question # 14
Which one of the following is correct?
Question # 15
Alternating current can induce voltage because it has a
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Q Qura-tul-Ain Ansari 13 - Mar - 2023 06 Min 42 Sec 60/60 -
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M musman shahid 03 - Jun - 2024 02 Min 53 Sec 30/60
ECAT Physics Chapter 16 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | The most common source of alternating voltage is: |
A. Motor
B. Transformer
C. AC genrator
D. Both (A) and (C)
|
| 2 | The r.m.s. value of alternating current is equal to its maximum value at angle of |
A. 60°
B. 45°
C. 30°
D. 90°
|
| 3 | In frequency modulation (FM), the carrier waves amplitude |
A. Remains constant
B. Increase
C. Decreases
D. None of these
|
| 4 | The device which allows only the flow of an A.C. through a circuit is |
A. Capacitor
B. Inductor
C. D.C. motor
D. Battery
|
| 5 | The amplifier which us used to perform mathematical operations electronically is known as |
A. calculator
B. OP-AMP
C. computer
D. any one of them
|
| 6 | In describing functions of digital systems, a closed switch will be shown as |
A. 0
B. 1
C. low
D. any one of these
|
| 7 | The value of output resistance of OP-AMOP is of the order of |
A. few ohms
B. few hundred ohms
C. several kilo ohms
D. several mega ohms
|
| 8 | Which of the following has a great concentration of impurity |
A. base
B. emitter
C. collector
D. none of these
|
| 9 | SI unit of impedance is |
A. hertz
B. henry
C. ampere
D. ohms
|
| 10 | Transmitting antenna emits |
A. Magnetic waves
B. Electric waves
C. Electromagnetic waves
D. Sound waves
|
Test Questions
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