# Electrical Engineering - RLC Circuits and Resonance

### Exercise :: RLC Circuits and Resonance - General Questions

11.

If the resistance in parallel with a parallel resonant circuit is reduced, the bandwidth

 A. disappears B. becomes sharper C. increases D. decreases

Explanation:

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12.

A 90 resistor, a coil with 30 of reactance, and a capacitor with 50 of reactance are in series across a 12 V ac source. The current through the resistor is

 A. 9 mA B. 90 mA C. 13 mA D. 130 mA

Explanation:

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13.

A resonant circuit has a lower critical frequency of 7 kHz and an upper critical frequency of 13 kHz. The bandwidth of the circuit is

 A. 7 kHz B. 13 kHz C. 20 kHz D. 6 kHz

Explanation:

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14.

If the value of C in a series RLC circuit is decreased, the resonant frequency

 A. is not affected B. increases C. is reduced to zero D. decreases

Explanation:

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15.

A 24 resistor, an inductor with a reactance of 120 , and a capacitor with a reactance of 120 are in series across a 60 V source. The circuit is at resonance. The voltage across the inductor is

 A. 60 V B. 660 V C. 30 V D. 300 V