MCQ Collection
Pakistan MCQs
Practice Pakistan questions with answers and explanations.
Choose an option to check your answer.
A.
Both half-cycles equally without extra diodes
B.
No part of the cycle
C.
One half-cycle
D.
Only the zero crossings
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Correct Answer: C. One half-cycle
Explanation:
Semiconductor behavior and quantized energy levels explain the electronic or atomic effect.
Choose an option to check your answer.
A.
Continuous electron energies only
B.
Molecular collisions without photons
C.
Nuclear fission
D.
Transitions between discrete energy levels
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Correct Answer: D. Transitions between discrete energy levels
Explanation:
Semiconductor behavior and quantized energy levels explain the electronic or atomic effect.
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A.
0.01 s
B.
0.0025 s
C.
0.005 s
D.
0.105 s
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Correct Answer: C. 0.005 s
Explanation:
The charging or discharging time constant is τ = RC.
Choose an option to check your answer.
A.
0.012 s
B.
0.003 s
C.
0.106 s
D.
0.006 s
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Correct Answer: D. 0.006 s
Explanation:
The charging or discharging time constant is τ = RC.
Choose an option to check your answer.
A.
2.4 A
B.
4.8 A
C.
1.2 A
D.
3.4 A
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Correct Answer: A. 2.4 A
Explanation:
The total series resistance is R+r.
Choose an option to check your answer.
A.
5.143 A
B.
2.571 A
C.
1.286 A
D.
3.571 A
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Correct Answer: B. 2.571 A
Explanation:
The total series resistance is R+r.
Choose an option to check your answer.
A.
4 A
B.
1 A
C.
2 A
D.
3 A
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Correct Answer: C. 2 A
Explanation:
The total series resistance is R+r.
Choose an option to check your answer.
A.
5.714 A
B.
1.429 A
C.
3.857 A
D.
2.857 A
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Correct Answer: D. 2.857 A
Explanation:
The total series resistance is R+r.
Choose an option to check your answer.
A.
Acyl chloride
B.
Alcohol
C.
Alkane
D.
Amide directly without substitution
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Correct Answer: A. Acyl chloride
Explanation:
Organic reactions are predicted from functional groups, reagents and mechanisms.
Choose an option to check your answer.
A.
Hemoglobin
B.
Keratin
C.
Collagen
D.
Insulin
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Correct Answer: A. Hemoglobin
Explanation:
Macromolecular properties depend on bonding, structure and functional groups.
Choose an option to check your answer.
A.
Alkene and water
B.
Carboxylic acid and alcohol
C.
Aldehyde and hydrogen
D.
Ketone and ammonia
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Correct Answer: B. Carboxylic acid and alcohol
Explanation:
Organic reactions are predicted from functional groups, reagents and mechanisms.
Choose an option to check your answer.
A.
Hemoglobin
B.
Collagen
C.
Amylase
D.
Glucagon
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Correct Answer: B. Collagen
Explanation:
Macromolecular properties depend on bonding, structure and functional groups.
