10) Calculate the line current of the 3 phase 415V 50 HZ supply for the balanced load of 3000 watt at 0.8 power factor is connected in star.

11) What is the power factor in a 3 phase power measurement of two wattmeters showing equal readings?

12) Calculate the power factor of coil having resistance of 24 Ohm, draws the current of 5A, at 240V/ 50HZ AC supply.

13) Calculate the power factor of R.L.C circuit having resistance (R) = 15 Ohm, resultant reactance (X) = 20W connected across 240V /50Hz AC supply?

14) Calculate the value admittance (Y) of the RLC parallel circuit connected across 240volts/50Hz AC supply and 8 Amp. Current is passed through it ?