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The mosquito coil we generally see in house hold purposes and heating coils in electrical heater etc are generally which spiral.

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The mosquito coil we generally see in house hold purposes and heating coils in electrical heater etc are generally which spiral.

(a) Logarithmic spiral

(b) Equiangular spiral

(c) Fibonacci spiral

(d) Archemedian spiral

I have been asked this question in quiz.

My question is taken from Construction of Spiral topic in chapter Geometrical Construction of Engineering Drawing

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Correct option is (d) Archemedian spiral

To elaborate: Archemedian spiral is a curve traced out by a point moving in such a way that its movement towards or away from the pole is uniform with the increase of the vectorial angle from the starting line. The use of this curve is made in teeth profiles of helical gears, profiles of cam etc.

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