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MDCAT - Practice Test - Physics - Electromagnetic Induction Quiz

Attempt 10 MCQs on MDCAT - Practice Test - Physics - Electromagnetic Induction | Quiz 3

21. What is mutual inductance?



22. What is the coefficient of coupling between two coils?



23. What is the coupling coefficient for an ideal transformer?



24. What is the motional emf for a conductor of length ℓ moving at speed v perpendicular to B?



25. A 200-turn coil experiences flux change from 0.05 Wb to 0.01 Wb in 0.1 s. Find induced emf.



26. A step-down transformer reduces voltage from 220 V to 22 V. What is the turns ratio (primary:secondary)?



27. A step-up transformer increases voltage from 100 V to 1000 V. Secondary has 500 turns. How many turns on primary?



28. What is the formula for power loss in a transmission line?



29. Why does a transformer not work on DC?



30. What is the efficiency of an ideal transformer?



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