Question

the wire of resistance 30 ohm is cut into 2 equal part and then both parts are connected in parallel. find the effective resistance

Answer 1

resistance of both parts = 15ohms
parallel combination of 15 ohms resistance = 15/2=7.5ohms

Answer 2

Explanation:

resistance of each part on cutting = 15 ohms

then,

resistance on connecting each of wire in parallal series = 15 /2

= 7.5ohms