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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.__and

**H = I^2 R t**__2.__

(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.

**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.