A 10 cm long magnetic needle that rotates about a horizontal axis is attached to the inside of a coil 50 cm long and 5000 wraps. A current of 2 A flows through the coil. Tie a string to the upper edge of the needle, which is passed over the pulley and a weight of 200 g is hung on it. What is the magnetic moment of the needle if an equilibrium is established at a deflection angle of 20 °?
A 10 cm long magnetic needle that rotates about a horizontal axis is attached to the inside of a coil 50 cm long and 5000 wraps. A current of 2 A flows through the coil. Tie a string to the upper edge of the needle, which is passed over the pulley and a weight of 200 g is hung on it. What is the magnetic moment of the needle if an equilibrium is established at a deflection angle of 20 °?
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A 10 cm long magnetic needle that rotates about a horizontal axis is attached to the inside of a coil 50 cm long and 5000 wraps. A current of 2 A flows through the coil. Tie a string to the upper edge of the needle, which is passed over the pulley and a weight of 200 g is hung on it. What is the magnetic moment of the needle if an equilibrium is established at a deflection angle of 20 °?
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