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The magnetic field of the solenoid is 18.84mT, the current is 30A. Calculate the number of turns per unit length if the core is air.

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The magnetic field of the solenoid is 18.84mT, the current is 30A. Calculate the number of turns per unit length if the core is air.

(a) 1500 turns/m

(b) 1000 turns/m

(c) 500 turns /m

(d) 2000 turns/m

I had been asked this question in semester exam.

The doubt is from Magnetic Field of a Solenoid in division Electromagnetism of Basic Electrical Engineering

1 Answer

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Correct choice is (c) 500 turns /m

To explain: The magnetic field in a solenoid is given by:

B=μnI

Substituting the values in the given values in the equation n=500 turns/m.

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