A conductor 40 cm long has a mass of 15 g and lies in a horizontal position, at a 90° angle to the field lines of a uniform horizontal magnetic field of 0.2 T. What must the current in the conductor be, so that the force on it will support its own weight

Physics

Degree Level: Pre-college

Question :

A conductor 40 cm long has a mass of 15 g and lies in a horizontal position, at a 90° angle to the field lines of a uniform horizontal magnetic field of 0.2 T. What must the current in the conductor be, so that the force on it will support its own weight?

Answer :

see attached image

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