Question

A wire of length 20 cm has a resistance of
2012. If the wire is cut into 10 equal parts,
then find the effective resistance when they
are connected in parallel.​

Answer 1

Answer:

Explanation:

The resistance of a wire depends directly on the length of a wire. thus if we reduce the length of a wire to half the resistance too will drop to half.

 

thus now two pieces will have 10 ohm resistance each

 

thus let equivaent resistance in parallel connection be Rq :

 

Thus 1/Rq = 1/10 +1/10

 

Rq = 10/2 =5 ohm