Question

The coil of a heater is cut into equal halves and one is used in the heater. What happened to the resistance of the coil?

Answer 1

Answer:

Resistance is directly proportional to the length of the wire. If half length of the wire is used, the resistance would become less.

Answer 2

Answer:

When heater coil is cut into two equal coil then length get halved. So following it resistance is also reduced to half. H=V²/R. By using this we can conclude that if resistance is halved then heat produced is doubled