Question

If four resistance each of 5 ohm are connected in parallel what is the effective resistance

Answer 1

the equivalent resistance will be ...

$\frac{1}{r} = 4 \times \frac{1}{5} \\ = > r = \frac{5}{4} = 1.25 \: ohm$

Answer 2

Answer:

1/5+1/5+1/5+1/5=4/5 =1/r

so r'=5/4