Question

The resistance of 10 ohm&20 oh are connected in series then the eqvilent resistance is

Answer 1

Answer:

Let R1 = 10 ohm ,R2 = 20 ohm & R3 = 4 ohm

Since R1 & R2 are in parallel, so equivalent resistance Rp is given by

1/Rp = 1/R1 + 1/R2 = 1/10 + 1/20 = (2+1)/20 = 3/20

So, Rp = 20/3 = 6.67 ohm

Now , Rp & R3 are connected in series, so equivalent resistance Rs is given by

Rs = Rp + R3 = 6.67 + 4 = 10.67 = 10.7 ohm Ans.