The replacement of the earlier transformer by a 40,000-220 V step-down transformer? (Neglect, as before, leakage losses though this may not be a good assumption any longer because of the very high voltage transmission involve).Hence explain why high-voltage transmission is preferred.

A step -down transformer converts a voltageof 2,200 V into 220 V in the transmission line. Number of turns in primary coil is 5,000. Efficiency of transformer is 90% and its output power is 8 kW. Calculate input power.

A step -down transformer converts a voltageof 2,200 V into 220 V in the transmission line. Number of turns in primary coil is 5,000. Efficiency of transformer is 90% and its output power is 8 kW. Calculate number of turns in secodnary coil.

A 100 micro F capacitor in series with a 40 ohm resistance is connected to a 110 V, 12 kHz supply? (a) What is the maximum current in the circuit? (b) What is time lag between the current maximum and voltage maximum? Hence, explain the statement that a capacitor is a conductor at very high frequencies. Compare this behaviour with that of a capacitor in a dc circuit after the steady state.