Alternating Cur...

In an ac circuit the reactance of a coil is $$ \sqrt{3} $$  times its resistance, the phase difference between the voltage across the coil to the current through the coil will be

In series $$LCR$$ circuit, in the condition of resonance, if $$C=1\mu F;L=1H$$ then frequency will be:

Which of the following components of a LCR circuit with ac supply dissipates energy

A resistance of $$ 40 $$ ohm and an inductance of $$ 95.5 $$ millihenry are connected in series in a $$ 50 $$ cycles/second ac circuit. The impedance of this combination is very nearly 

A coil of $$ 200 \, \Omega $$ resistance and $$ 1.0 H $$ inductance is connected to an ac source of frequency $$ \dfrac{200}{2 \pi} \, Hz $$. Phase angle between potential and current will be

An alternating current circuit is in resonance at $$10kHz$$ frequency. If frequency increases to $$12kHz$$, then what will be effect on impedance?

The current lags behind the voltage by a phase different of $$\pi /2$$ radian, when in the circuit is:

Which of the following is used in a circuit which shows that the current lead the voltage at the phase:

The reactance of a capacitor of capacitance C is X. If both the frequency and capacitance be doubled, then new reactance will be 

A sinusoidally varying potential difference has amplitude $$170 \,V$$. What is its rms value?