Describe an experiment to determine the magnetic flux density of a uniform magnetic field using a search coil and ballistic galvanometer

Describe an experiment to determine the magnetic flux density of a uniform magnetic field using a search coil and ballistic galvanometer

A search coil of cross section area A and number of turn’s N is connected in series with ballistic galvanometer. The search coil is then placed in uniform magnetic field such that the plane of the coil is perpendicular to the magnetic field. The coil is then pulled completely out of the field. The first deflection of the ballistic galvanometer noted θ₁.

A capacitor of known capacitance C is then charged to a p.d. V and then charged through the ballistic galvanometer, θ₂ is noted.

The magnetic flux density of uniform magnetic field is obtained from

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