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The current in a solenoid is 30A, the number of turns per unit length is 500 turns per metre. Calculate the magnetic field if the core is air.

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The current in a solenoid is 30A, the number of turns per unit length is 500 turns per metre. Calculate the magnetic field if the core is air.

(a) 18.84T

(b) 18.84mT

(c) 1.84T

(d) 1.84mT

The question was asked in an internship interview.

This intriguing question originated from Magnetic Field of a Solenoid in chapter Electromagnetism of Basic Electrical Engineering

1 Answer

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Best answer
The correct option is (b) 18.84mT

The best explanation: The magnetic field in a solenoid is given by:

B=μnI

Substituting the values in the given values in the equation, B=18.84mT.

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