Physics

Problem

30\,\Omega

resistor,

0.10\,\text{H}

inductor and

50\,\mu\text{F}

capacitor are connected in series to a sinusoidal source of fixed rms voltage. If the supply frequency is doubled from

50\,\text{Hz}

100\,\text{Hz}

, the approximate power factor of the circuit at

100\,\text{Hz}

is a)

0.70\; (\text{leading})

0.70\; (\text{lagging})

0.50\; (\text{lagging})

0.86\; (\text{lagging})