26. A step-up transformer will ___ to the secondary.
27. The voltage V2 is _____ in the given circuit.
28. ___ is the concept of one coil inducing a voltage into another coil.
29. A(n) _____ transformer is usually used for audio or power applications.
30. A(n) ___ is sometimes constructed as a variable transformer.
31. When does maximum power transfer happen from the source to the load?
32. A transformer is plugged into a 120 V rms source and has a primary current of 300 mA rms. The secondary is providing 18 V across a 10 load. What is the efficiency of the transformer?
33. The coefficient of coupling between two coils is 0.45. The first coil has an inductance of 75 mH and the second coil has an inductance of 105 mH. What is the mutual inductance between the coils?
34. Increasing the number of turns of wire on the secondary of a transformer will
35. What is the turns ratio of the transformer needed to match a 1 k source resistance to a 160 load?