MEDIUM
JEE Main
IMPORTANT
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As shown in the figure, a metallic rod of linear density is lying horizontally on a smooth incline plane which makes an angle of with the horizontal. The minimum current flowing in the rod required to keep it stationary, when magnetic field is acting on it in the vertically upward direction, will be
(Use )


(a)
(b)
(c)
(d)

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Important Questions on Magnetic Effects of Current and Magnetism
MEDIUM
JEE Main
IMPORTANT
A triangular shaped wire carrying current is placed in a uniform magnetic field of , as shown in figure. The magnetic force on segment is (Given ).

MEDIUM
JEE Main
IMPORTANT
The magnetic field at the center of current carrying circular loop is . The magnetic field at a distance of times radius of the given circular loop from the center on its axis is . The value of will be

EASY
JEE Main
IMPORTANT
A closely wounded circular coil of radius produces a magnetic field of at its center. The current through the coil is _____ . [Given, number of turns in the coil is and ]

EASY
JEE Main
IMPORTANT
A wire of length carrying current of is bent to form a circle. The magnetic moment of the coil is . [Given ]

MEDIUM
JEE Main
IMPORTANT
A wire of length carrying a current of is placed parallel to a long wire of length . The wire carries a current of . The distance between two wires is and currents flow in the same direction. The force acting on the wire is :

EASY
JEE Main
IMPORTANT
The vertical component of the earth's magnetic field is at any place where the angle of dip is . The earth's resultant magnetic field at that place will be (Given )

EASY
JEE Main
IMPORTANT
Two long straight wires and carrying equal current each were kept parallel to each other at distance. Magnitude of magnetic force experienced by length of wire is . If distance between wires is halved and currents on them are doubled, force on length of wire will be:

MEDIUM
JEE Main
IMPORTANT
A circular loop of radius is carrying current . The ratio of magnetic field at the centre of circular loop and at a distance from the center of the loop on its axis is :
