A 10.5- resistor, a 15.9-μF capacitor, and a 15.2-mH inductor are connected in series with a 203-V generator. (a) At what frequency is the current a maximum? (b) What is the maximum value of the rms current? Note: The ac current and voltage are rms values and power is an average value unless indicated otherwise.

(a) Frequency at which current is maximum is 323.9 Hz

(B) Maximum current in the circuit is 19.333 A

Explanation:

We have given resistance R = 10.5 ohm

Capacitance

Inductance

(a) Current is maximum when impedance will be minimum and impedance is minimum when there is condition of resonance.

At resonance

f = 323.9 Hz

(b) Current will maximum when resonance occurs at resonance impedance of the circuit is equal to resistance.

Voltage is given V = 203 volt

So maximum current

the duration of a photographic flash is related to an rc time constant, which is 0.100 μs for a certain camera.