"To reduce power dissipation in the connecting wires between different power stations of hundreds miles long, wires current at enormous valve of V".Explain.

A charged capacitor is connected to an inductor at an instant of time t=0.If the capacitor and the inductor are taken to be pure, write down the equation of effective potential difference across the combination at any instant of time t and solve it for instantaneous current through I the combination.Explain brefly the exchange of electric and magnetic energy between the capacitor and the inductor.

What is power dissipation in an ac circuit in which voltage and current are given by : V= 300 sin (ωt+(pi/r)) and I = 5 sin ωt?

A capacitor and resistor are connected in series with an ac source. If the potential difference across C and R are 120 V and 90V respectively and if the rms current of the circuit is 3A, calculate (i) impedance and (ii) power factor of the circuit.

Obtain an expression for the heat produced in a wire, when a current I passes through it against potental difference V.