Transformers Questions

• If voltage is stepped-up to the secondary, current will be stepped-down by the same amount.
• A transformer that has 700 turns in the primary and 35 turns in the secondary has a turns ratio of 20:1.
• In the given circuit, Maximum power is being transferred to the load.
• For mutual inductance to occur, the two coils must be at right angles to each other.
• A transformer turns ratio of ________ will be needed to match an output impedance of 5 kΩ to an 8 Ω speaker.
• ___ is the concept of one coil inducing a voltage into another coil.
• The secondary current is _____ in the given circuit.
• A step-up transformer will ___ to the secondary.
• ___ occurs in a transformer when some of the primary flux lines pass through the air instead of the core.
• Making the load resistance appear the same as the source's internal resistance is called _____.
• The reflected resistance is ___ as seen by the source in the given circu.
• To ensure a high coefficient of coupling, all fixed transformers are usually wound on a(n) _____________.
• A(n) _____ transformer is usually used for audio or power applications.
• The voltage V2 is _____ in the given circuit.
• A(n) ___ is sometimes constructed as a variable transformer.