Electrical Engineering MCQs for competitive tests, job tests, university exams are provided on various Electrical and Electronics topics.
Electrical Engineering MCQs on Power Transmission MCQs Part 25 The correct statement about corona loss is The correct statement about corona loss is: Correct answer: 1. Corona loss is more prominent in HVAC system The value of diversity factor is The value of diversity factor is Correct answer: 4. Greater than 1 The most suitable … Read more
Electrical Engineering MCQs on Power Transmission MCQs Part 24 Transposition is carried out on Transposition is carried out on: Correct answer: 3. Both of these Due to proximity effect, the increase in conductor resistance is not negligible in Due to proximity effect, the increase in conductor resistance is not negligible in: Correct answer: 3. Underground … Read more
Electrical Engineering MCQ on Capacitance When the voltage across a capacitor is tripled, the stored charge Correct answer: 4. Triples See below: Capacitors, voltage and charge
Electrical Engineering MCQ on Capacitance The capacitive reactance of a 0.47 µF capacitor that is across a 2 kHz sine wave signal source: Correct answer: 4. 170 Ω Explanation Formula for capacitive reactance Xc = 1/ωC=1/2πfC = 1/(2π * 2 kHz * 0.47 µF) = 169.31 ≈ 170 Ω
Electrical Engineering MCQ on Capacitance A capacitor blocks AC but allows DC Correct answer: 2. False See below: Working of capacitors
Electrical Engineering MCQ on Capacitance If Q = 60 µC and V = 12 V, the capacitance is: Correct answer: 1. 5 µF Explanation: From formula: C = q/V = 60 µC/12 = 5 µF
Electrical Engineering MCQs on Capacitance Four capacitors of 0.15 µF are connected in parallel. The total capacitance is: Correct answer: 1. 0.0375 µF Explanation: Formula for parallel capacitors: 1/CT = 1/C1 + 1/C2 + 1/C3 + 1/C4 CT = 0.0375 µF
Which of following is relationship of capacitance of a capacitor to relative permittivity Correct answer: 1. Capacitance is directly proportional relative permittivity
The per phase DC armature resistance of an atlernator is 1 Ω. The effective AC armature ressitance should be around: Correct answer: 1. 1.5 Ω Explanation: Since harmonics are generated in individual coils of alternator windings, some high frequencies are present. ———- Due to skin effect, effect AC resistance of armature windings is greater than … Read more
Electrical Engineering MCQs on Synchronous Generator The synchronous reactance of alternator is due to: Correct answer: 1. Armature reaction