Question

If a 15-ohm resistor is connected in parallel with a 30 ohm-resistor, the equivalent resistance is?

Answer 1

Step-by-step explanation:

Equilibrium resistance=1/R1 +1/R2

`= (1)/(15) + (1)/(30) \\ = (2 + 1)/(30) \\ (1)/(r) = (3)/(30) \\ resistance \: = (30)/(3) \\ = 10 \: ohms`

Answer 2

Step-by-step explanation:

in parallel combination equivalent resistence =

1/R=1/R1 + 1/R2

1/2=1/15+1/30

1/2=1*2+1*1/30

1/R=3/30

R*3=30*1

R=30/3

R=10 ohm