A rod when suspended in a magnetic field stays in east-west direction. Can we be sure that the field is in the east-west direction? Can it be in the north-south direction?

explain a freely suspended magnet is always pointing along the north-south direction.

A uniform magnetic field of 1.5 T exists in a cylindrical region of radius 10.0 cm, its direction parallel to the axis is along east to west. A wire carrying current of 7.0 A in the north to south direction passes through this region. What is the magnitude and direction of the force on the wire if, a. the wire intersects the axis, the wire is turned from N S to north east-south west direction. c. the wire in the N-S direction is lowered from the axis by a distance 6.0 cm.

A particle of charge q moves with velocity vec(v) along positive y - direction in a magnetic field vec(B) . Compute the Lorentz force experienced by the particle (a) when magnetic field is along positive y-direction (b) when magnetic field points in positive z -direction (c ) when magnetic field is in zy - plane and making an angle theta with velocity of the particle. Mark the direction of magnetic force in each case.

The maximum electric field in a plane electromagnetic wave is 600 N C^-1 . The wave is going in the x-direction and the electric field is in the y- direction. Find the maximum magnetic field in the wave and its direction.

A proton beam is going from east to west. Is there an electric current ? If yes, in what direction?

The horizontal component of the earth's magnetic field at a place is 3.0 X 10^(-4) T and the dip is 53^@ . A metal rod of length 25cm is placed in the north - south direction and is moved at a constant speed of 10cm s^(-1) towards east. Calculate the emf induced in the rod.

Various laws to find the direction of magnetic field in a conductor.

Two identical charged protrudes moving with the same speed enter a region of uniform magnetic field . If one of these enters normal to the field direction and the other enters along a direction at 30^(@) with the field . What would be the ratio of their angular frequencies.