Answer : The resistance of a circuit is 2 ohm.
Explanation :
Using Ohm's law :

Or,

where,
R = resistance of a circuit = ?
V = voltage of circuit = 10 volts = 10V
I = current flowing in a circuit = 5 A
Now put all the given values in the above formula, we get the resistance of circuit.



Therefore, the resistance of a circuit is 2 ohm.