Exam 20: Inductance

An advantage of using a transformer with a separate winding secondary is

One henry is the amount of inductance that allows one volt to be induced when the current changes at the rate of one ampere per second.

A coil has some ______________ between windings.

Air-core coils for rf applications have inductance values in mH and ?H.

The base unit for inductance is the gilbert.

The rate of flux change is greatest when the alternating current passes through zero.

For two coils with mutual inductance, any magnetic lines that do not link the two coils result in

Which of the following is not an advantage of using an autotransformer?

What is the primary current for a transformer with a 1:10 turns ratio that has 720 V across 7200 ? in the secondary?

A coil has more inductance than the equivalent length of straight wire because the coil concentrates magnetic flux.

Inductance is the characteristic that opposes any change in voltage.

What is a current that flows in a circular path through the cross section of a transformer core that results in a loss?

How is mutual inductance affected when primary and secondary inductances are increased and coupling is made tighter?

Too much current flowing through a coil will increase its permeability and inductance.

The amount of power the transformer can deliver to a resistive load is called

A typical air-core rf inductor is called a choke.

The ability of a conductor to induce voltage in itself when current changes is its self-inductance.

The ability of a conductor to induce voltage in itself when the current changes is its ______________.

When the secondary of a transformer has more turns than the primary, the secondary voltage is

An induced voltage across a coil is actually the result of inducing electrons to move in a conductor; however there is no induced current.