What is the difference between a resistor and resistance ?

What is the difference between resistance and resistor?

What is difference between ohmic resistance and impedance of an a.c. circuit.

What is phase difference between V and I in a circuit containing only a resistor ?

Answer the following State the difference between effective resistance, when resistors are connected in parallel and series.

If the potential difference between A and D is V, what will be potential difference between F and C. each of the resistance is R.

If the potential difference between A and D is V, what will be potential difference between F and C. each of the resistance is R.