PhysicsHardHigh School (11–12)Electricity & Magnetism › Magnetic Effects of CurrentJEE MainAPA-LevelIB
Created by StemPy LabTwo identical flat coaxial coils, each of turns and radius cm, carry A in the same sense. Their centres are cm apart, on a common axis. What is the field on the axis, halfway between the centres?
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← A toroid has 650 turns and carries 3 A. Its inner radius is 10 cm and its outer radius is 14 cm. By how much is the field at the inner edge larger than the field at the outer edge?A long wire carries 15 A. It is bent into a hairpin: two long straight parts, parallel to each other, joined by a semicircle of radius 5 cm. Each straight part ends exactly where the semicircle begins. What is the size of the field at the centre of the semicircle? →
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