1. Lenz's law is a consequence of the law of conservation of ? induced current charge energy induced e.m.f. Answer: energy Explanation: View Answer Discuss in Forum Report Question

 2. A coil induces 350 mV when the current changes at the rate of 1 A/s. The value of inductance is ? 3600 mH 350 mH 260 mH 150 mH Answer: 350 mH Explanation: View Answer Discuss in Forum Report Question

 3. A coil is wound on iron core which carries current. The self-induced voltage in the coil is not affected by ? variation in coil current variation in voltage to the coil change of number of turns of coil the resistance of magnetic path Answer: variation in voltage to the coil Explanation: View Answer Discuss in Forum Report Question

 4. The co-efficient of coupling between two air core coils depends on ? self-inductance of two coils only mutual inductance between two coils only mutual inductance and self inductance of two coils none of the above Answer: mutual inductance and self inductance of two coils Explanation: View Answer Discuss in Forum Report Question

 5. For a 30 mH inductance (L1) and a 60 mH inductance (L2) The total inductance of L1 and L2 in parallel without mutual coupling will be ? 5mH 10 mH 16 mH 20 mH Answer: 20 mH Explanation: View Answer Discuss in Forum Report Question

 6. Two coils have self-inductances of 10 H and 2 H, the mutual inductance being zero. If the two coils are connected in series, the total inductance will be ? 6 H 8 H 12 H 24 H Answer: 12 H Explanation: View Answer Discuss in Forum Report Question

 7. The self inductances of two coils are 8 mH and 18 mH. If the co-efficients of coupling is 0.5, the mutual inductance of the coils is ? 4 mH 5 mH 6 mH 12 mH Answer: 6 mH Explanation: View Answer Discuss in Forum Report Question

 8. Which of the following is unit of inductance ? Ohm Henry Ampere turns Webers/metre Answer: Henry Explanation: View Answer Discuss in Forum Report Question

 9. The law that the induced e.m.f. and current always oppose the cause producing them is due to ? Faraday Lenz Newton Coulomb Answer: Lenz Explanation: View Answer Discuss in Forum Report Question

 10. Mutually inductance between two magnetically-coupled coils depends on ? permeability of the core the number of their turns cross-sectional area of their common core all of the above Answer: all of the above Explanation: View Answer Discuss in Forum Report Question