Electrical Engineering MCQs
Electrical Engineering MCQs for PPSC, FPSC, NTS, and competitive exams cover power systems, electronics, circuits, machines, and electromagnetism. Practice these questions to master concepts, improve time management, and excel in electrical engineering tests in Pakistan.
Q: The unit of electrical resistance
A) Ampere
B) Watt
C) Ohm
D) Volt
β
Correct Answer: C
Explanation: Resistance is measured in ohms, denoted by the Greek letter Ξ©.
Q: A transformer primarily functions to
A) Change power
B) Change resistance
C) Change frequency
D) Change voltage
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Correct Answer: D
Explanation: Transformers are used to increase or decrease voltage levels in AC circuits.
Q: Ohmβs law relates
A) Power, current, resistance
B) Voltage, current, resistance
C) Voltage, power, capacitance
D) Current, resistance, capacitance
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Correct Answer: B
Explanation: Ohmβs Law states V = IR, relating voltage, current, and resistance.
Q: Kirchhoffβs voltage law is based on the principle of
A) Mass conservation
B) Power conservation
C) Energy conservation
D) Charge conservation
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Correct Answer: C
Explanation: It states that the total voltage around a closed loop equals zero, reflecting energy conservation.
Q: The function of a diode in a circuit is to
A) Control resistance
B) Allow current in one direction
C) Block current
D) Amplify signals
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Correct Answer: B
Explanation: A diode allows current flow in one direction only, acting as a rectifier.