
A very long cylindrical wire is carrying a current distributed uniformly over its cross-section area. is the centre of the cross-section of the wire and the direction of current is into the plane of the figure. The value of along the path (from to ) is


Important Questions on Magnetic Effect of Current


Figure and shown two long straight wires of circular cross-section ( and with ), carrying current which is uniformly distributed across the cross-section. The magnitude of magnetic field varies with radius and can be represented as:


A current is flowing along an infinite, straight wire, in the positive direction and the same current is flowing along a similar parallel wire apart, in the negative direction. A point is at a perpendicular distance from the first wire and from the second. What will be the magnitude of the magnetic field of ?

A long thin hollow metallic cylinder of radius has a current ampere. The magnetic induction away from the axis at a distance from the axis varies as shown in

A very long straight wire of radius carries current . Intensity of magnetic field at a point lying at a perpendicular distance from the axis is _____ .



Two very long straight wires are set parallel to each other. Each carries a current in the same direction and the separation between them is The intensity of the magnetic field at point as shown in the figure is _________.



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A circuit is in the form of a regular hexagon of side with its centre at the point . A current flows in the circuit.
The magnitude of the magnetic field at is





