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 skin effect in conductors increases with
A) Higher frequencies
B) Lower frequencies
C) Zero voltage
D) Larger resistance
✅ Correct Answer: A
Explanation: At high frequencies, current flows near the conductor’s surface.
Q: An oscilloscope is used to measure
A) Frequency
B) Voltage and waveform
C) Current only
D) Temperature
✅ Correct Answer: B
Explanation: Oscilloscopes visualize and measure electrical waveforms.
Q: The purpose of using a relay in circuits is to
A) Protect against overvoltage
B) Amplify current
C) Store charge
D) Switch circuits remotely
✅ Correct Answer: D
Explanation: Relays switch electrical circuits mechanically or electronically.
Q: When a circuit is open, the current is
A) Moderate
B) Zero
C) Infinite
D) Maximum
✅ Correct Answer: B
Explanation: An open circuit means a break, so no current flows.
Q: The instrument for measuring very small currents is
A) Voltmeter
B) Wattmeter
C) Galvanometer
D) Ammeter
✅ Correct Answer: C
Explanation: Galvanometers detect and measure small electric currents.