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: An ideal op-amp has
A) Infinite gain
B) All of these
C) Zero output impedance
D) Infinite input impedance
✅ Correct Answer: B
Explanation: An ideal op-amp is assumed to have infinite gain, infinite input impedance, and zero output impedance
Q: Increasing frequency in an RC circuit affects capacitive reactance how
A) It increases
B) It decreases
C) Depends on resistor value
D) No change
✅ Correct Answer: B
Explanation: Capacitive reactance (Xc) = 1 / (2πfC), so it decreases with frequency
Q: In a power system, the term ‘load shedding’ refers to
A) Stabilizing voltage
B) Increasing load capacity
C) Intentional power cut
D) Turning off appliances
✅ Correct Answer: C
Explanation: Load shedding helps balance demand and supply by reducing load
Q: Kirchhoff’s Voltage Law is based on
A) Conservation of charge
B) Conservation of energy
C) Newton’s law
D) Ohm’s Law
✅ Correct Answer: B
Explanation: KVL states that the total voltage around any closed loop is zero, conserving energy
Q: The primary use of a transformer is to
A) Change AC voltage levels
B) Increase resistance
C) Convert DC to AC
D) Measure current
✅ Correct Answer: A
Explanation: Transformers transfer electrical energy between circuits, adjusting AC voltage