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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 describing functions of digital systems, a closed switch will be shown as
Question # 2
At resonance, the phase angle for RLC series resonance circuit equals
Question # 3
In frequency modulation (FM), the carrier waves amplitude
Question # 4
During each cycle, alternating voltage reaches a peak value
Question # 5
Alternating current can induce voltage because it has a
Question # 6
The closed loop gain of the non-inverting amplifier is given by
Question # 7
Most OP-AMP operates with
Question # 8
A sinusoidally alternating voltage or current can be graphically represented by a:
Question # 9
OP-AMP has the following input terminals
Question # 10
The closed loop gain of the inverting amplifier is written as
Question # 11
When the pn-junction is connected reversed biased, its resistance is of the order of
Question # 12
The Instantaneous value of alternative current maybe:
Question # 13
An A.C. voltmeter read 250 volts. The frequency of alternating is 50 Hz, the peak value of voltage is
Question # 14
The output voltage of half wave rectification is in the form of
Question # 15
When the p-n junction is forward biased its resistance is of the order of
Top Scorers Of ECAT Physics Chapter 16 Alternating Current MCQ`s Test
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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 -
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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 | The length of rotating vector (on a certain scale) represents the: |
A. Peak value of alternating quantity
B. RMS value of alternating quantity
C. Instantaneous value of alternating quantity
D. Either (B) or (C)
|
| 2 | The R1= infinity and R2= 0, then the gain of non-inverting amplifier is |
A. zero
B. infinity
C. one
D. any one of these
|
| 3 | 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
|
| 4 | The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its |
A. Icwill decrease
B. VCEwill increase
C. ICwill increase
D. VCCwill increase
|
| 5 | The time interval during which the Voltage source changes its polarity once is known as: |
A. Time period T
B. Half the time period
C. Quarter the time period
D. Two third of the time period
|
| 6 | In a transistor, the central region is called |
A. collector
B. emitter
C. base
D. none of them
|
| 7 | In describing functions of digital systems, a closed switch will be shown as |
A. 0
B. 1
C. low
D. any one of these
|
| 8 | 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
|
| 9 | The alternative voltage of current is actually measured by: |
A. Its RMS value
B. Square root of its mean square value
C. Instantaneous value
D. Peak value
|
| 10 | Which of the following has a great concentration of impurity |
A. base
B. emitter
C. collector
D. none of these
|
Test Questions