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CSE · Paper I · Electricity & Magnetismcse-1990-subject-03-004

Biot–Savart law — UPSC Physics Optional CSE 1990 Paper I

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Starting from Biot-Savart law, calculate the magnetic field at the centre of a solenoid of length 1 meter, radius 2 cm and having 25 turns per centimeter, the current through the solenoid being 1 ampere.

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