constants for charging and discharging resistive-inductive circuits. You will also be able to explain the meaning of

resonance and the purpose, characteristics, operation, and use of series and parallel resonant circuits.

and 4 (answer 23 of the 30 questions correctly).

In the analysis of AC circuits in the previous subcourse, you learned the characteristics of inductive and capacitive

reactance. When inductive and capacitive reactances are equal in magnitude, the circuit is said to be resonant. Since

the resonant circuit is sensitive to differences in frequency, it becomes important in many electronic devices where

frequency selection or rejection is required. Resonant circuits are used in electronics to determine the frequency of

operation of transmitters and receivers; in radio to allow selection of stations broadcasting on different frequencies; and

in telephone communication circuits to permit simultaneous transmission of dozens of conversations on a single line.

The series resonant circuit consists of capacitance and inductance in series. Resistances in the coil, condenser,

generator, and wiring are generally represented as one resistor in this type of circuit. This combination is possible

because resistances in series always add arithmetically.

The current and voltage conditions in a series resonant circuit are shown in figure 1-1 where equal inductive and

capacitive reactances are represented. This is a resonant circuit. Generally, the series resistance of such a circuit is

small compared with the reactance of the coil or the capacitor. In the circuit

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