Good Morning, My TextBook says that - Electric heaters use alloy material because they have higher resistance, which helps in producing heat. What I say - But more resistance means less heat at constant voltage because 1. H = I^2 R t and 2. P = V^2 / R[/U] (For eq. 1 Current, I, has double importance. Decreasing R would increase I, which in turn on getting squared, would produce significantly more heat) OR (Current I is more valuable in producing heat than resistance R, see eq. 1) So shouldn't we use metals of lesser resistance so as to produce more heat? I think using alloys would be much power efficient than metals, maybe thats why they use alloys. Note: Please refer https://www.physicsforums.com/showthread.php?t=5608 Thanks in advance.