Question

A wire having a resistance of 90 ohm is cut into a three equal parts.The three equal parts are then joined in parallel.What is the value of the resistance of the combination

Answer 1

Answer:

When 90 ohm cuts into 3 equal parts it becomes 30 ohm(each part).

So equivalent resistance of 3 parallel 30 ohm resistance is= R

Then 1/R=1/30 +1/30 +1/30

=3/30

=1/10

So R=10 ohm