Determine the resistance of the conductor if, at a voltage of 220V, a charge of Q = 30 C passed through it during 20C.

Find the current in the conductor from the formula
Q = I * T,

Where
Q is the amount of charge in coulombs;
I is the current in amperes;
T is the time in seconds.

I = Q / T = 30 C / 20 s = 1.5 C / s = 1.5 A.

From the formula of Ohm’s law, we determine the resistance of the conductor
U = I * R;
R = U / I = 220 V / 1.5 A = 147 Ohm.

Answer: the resistance of the conductor is 147 ohms.