Question

Statement 1: CFLs are preferred over electric bulbs.
Statement 2: Copper wire used in household circuits does not get hot, but nichrome wire does.

Answer 1

1. Compact fluorescent lamps (CFLs) are chosen over incandescent light bulbs because they use less energy and do not waste energy in the form of heat.
   
   
2. The amount of heat produced in a wire depends on its material, length, and thickness.

• The wires used for making electric circuits which are made of metals like copper do not normally become hot as there is no hindrance to the flow of current and much heat is not generated in the circuit.
• On the other hand, the elements, made of an alloy such as nichrome, of some electric appliances become so hot as they hinder the flow of current and as a result, heat gets generated.