1. (a) At what frequency will the main current *i* be in phase with the voltage *V* ?

(b) If *V*=200 Volts what will be the value of *i* at the frequency you calculated in (a) ?

2. (a) At what frequency will the main current *i* be in phase with the voltage *V* ?

(b) If *V*=150 Volts what will be the value of *i* at the frequency you calculated in (a) ?

3. (a) Find *i* for 50Hz and 100Hz and give the power factor in both cases

(b) Find for the 100Hz case only