Exam 26: Resonance

A parallel LC circuit is often called a tank circuit.

What does 4p² equal?

The lower the Q

The most common application of resonance in rf circuits is called tuning.

Capacitors used in tuned circuits generally have high Q because

At higher frequencies, skin effect causes coil resistance to be lower than the coil's dc resistance alone.

Capacitors used in tuned circuits generally have high Q because of their low ______________.

The Q is a numerical factor without any units, because it is a ______________ of reactance to resistance and the ohms cancel.

At parallel resonance

The process of producing sine waves after a pulse of energy has been applied is called ______________ of the LC circuit.

It is simply for convenience in calculations that the bandwidth is defined between the two frequencies having ______________% response.

An ac circuit that has equal and opposite reactances is called a(n)

In radio frequency circuits, the main application of resonance is

What value of C resonates with a 239-?H L at 1000 kHz?

A response curve of a series resonant circuit shows that current is small below resonance, maximum at resonance, and drops off to small values above resonance.

The width of the resonant band of frequencies centered around f_r is called the ______________ of the tuned circuit.

The frequencies above and below the resonant frequency which have a current or voltage value equal to 70.7% of its value at resonance are called

What is used to indicate the quality, or figure of merit of a resonant circuit?

Obtaining resonance at different frequencies by varying either L or C is called

For a series LC circuit at resonance, Z_T = r_s.