We have a combination of four resistors of value 5 Ohms each connected in Parallel. What is the net resistance of the circuit?

20 Ohms 5/2 Ohms 5/4 Ohms 20/3 Ohms

5/4 Ohms

When n resistors of equal value are connected in parallel combination, the net resistance is = R / n Reff = 5 Ohms/4 = 5/4 Ohm