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qUESTIONS

MCQs-PYQs-12th-jee

A long straight wire carries a current of π amp. The magnetic field due to it will be 5×10-5 weber/m2 at what distance from the wire [μ0= permeability of air]

MCQs-PYQs-12th-jee

Two long straight wires are set parallel to each other. Each carries a current i in the same direction and the separation between them is 2r. The intensity of the magnetic field midway between them is

MCQs-PYQs-12th-jee

A straight wire carries a current vertically upwards. A point P lies to the east of it at a small distance and another point Q lies to the west at the same distance. The magnetic field at P is

MCQs-PYQs-12th-jee

The figure shows the cross-sectional view of the hollow cylindrical conductor with inner radius R and outer radius 2R, cylinder carrying uniformly distributed current I along its axis. The magnetic induction at a point P at distance 3R/2 from the axis of the cylinder will be:

MCQs-PYQs-12th-jee

A steady conductor is flowing through a cylindrical conductor

MCQs-PYQs-12th-jee

Biot Savart law indicates that the moving electrons velocity v produce a magnetic field B such that

MCQs-PYQs-12th-jee

For the magnetic field to be maximum due to a small element of a current-carrying conductor at a point, the angle between the element and the line joining the element to the given point must be

MCQs-PYQs-12th-jee

When a wire is oriented in an east-west direction and carries an eastward current, the magnetic field at a point to the south of the wire is

MCQs-PYQs-12th-jee

Energy in a current carrying conductor is stored in the form of

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