question 1

a 3-phase star-connected system has 230v between each phase and neutral. the load consists of resistances of 4, 5, and 6ohms respectively in the three phases. find magnitudes of the current in the three phases and of the neutral wire

question 2

a coil has an inductance of 0.06henry and a resistance of 2.5ohms. the coil is in series with a capacitance of 6.8uf accross a 230v, 50Hz, single phase supply. calculate current and the angel of phase differece between it and the applied voltage. if the voltage is 10% harmonic of 5 times the fundimental frequency, calculate the current due to this harmonic and the total pd on the capacitance.

question 3

find the rms value of the folllowing componets of a complex wave: fundamental = 410volts; third harmonic = 57volts; fith harmonic = 25volts

fundamental = 20ampares; third harmonic = 12amperes; fith harmonic = 5amperes

question 4

a singel phase inductive circuit at 400volts 50hz has an impedance of 8 ohms and a power of 5kw. a capacitor is added in parrallel, of 300uf capacitance. find the value of the final power factor.

i would appriciate it if anyone could help me out here