The current in any AC circuit reverses every cycle.
ac supply is given and then in the circuit rectifier converts ac to dc
No.
An RL circuit is a circuit containing resistance (R) and an inductance (L).
this is because you have a short in either the the ac circuit or the fan/blower circuit. You'll know know which one by turning the fan on without the ac, and if it doesn't blow the fuse then you know it's the ac circuit.
Impedance
Transistor are DC output, Triac are AC output.
leading the voltage.
XL=XC
yes
because it doesnt
We will always calculate rms value only since the average value of ac current or voltage is zero. So we are using rms values in the ac circuit to calculate the power and to solve an ac circuit.