Atoroid of mean radius 26 cm and circular cross section of radius 1.9 cm is wound with a superconducting wire of length 1000 m that carries a current of 410 a. (a) what is the number of turns on the coil?

8377 turns

Explanation:

Given:

Mean radius of toroid = 26 cm

Circular cross-section radius, r = 1.9 cm = 0.019

Length of the wire, l = 1000 m

The number of turns (n) on the coil is given by  

where,

l is the length of the wire

s is the circumference of the circular wire

⇒

or

or

n = 8376.57 or 8377 turns

hence, the number of turns on the coils is 8377

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answer; equivalent to a one(1) horsepower motor;