1. The period of a sine wave is 5 seconds. Its frequency is ? 20 Hz 30 Hz 40 Hz 50 Hz Answer: 50 Hz Explanation: View Answer Discuss in Forum Report Question

 2. Ohm is unit of all of the following except ? inductive reactance capacitive reactance resistance capacitance Answer: capacitance Explanation: View Answer Discuss in Forum Report Question

 3. In a purely inductive circuit ? actual power is zero reactive power is zero apparent power is zero none of above is zero Answer: actual power is zero Explanation: View Answer Discuss in Forum Report Question

 4. Form factor for a sine wave is ? 1.414 0.707 1.11 0.637 Answer: 1.11 Explanation: View Answer Discuss in Forum Report Question

 5. In a circuit containing R, L and C, power loss can take place in ? C only L only R only all of the above Answer: R only Explanation: View Answer Discuss in Forum Report Question

 6. Power factor of magnetising component of current of a transformer is ? 0.8 lag 0.8 lead zero unity Answer: zero Explanation: View Answer Discuss in Forum Report Question

 7. For the same peak value, which of the following wave bas the least mean value ? half wave rectified sine wave triangular wave sine wave square wave Answer: half wave rectified sine wave Explanation: View Answer Discuss in Forum Report Question

 8. All the rules and laws of D.C. circuit also apply to A.C. circuit containing ? capacitance only inductance only resistance only all of the above Answer: resistance only Explanation: View Answer Discuss in Forum Report Question

 9. The frequency of domestic power supply in India is ? 200 Hz 100 Hz 60 Hz 50 Hz Answer: 50 Hz Explanation: View Answer Discuss in Forum Report Question

 10. The power factor of a D.C. circuit is always ? less than unity unity greater than unity zero Answer: unity Explanation: View Answer Discuss in Forum Report Question