A horizontal overhead power line carries current in the east to west direction produces a magnetic field of `1.2 xx 10^(-5)T`, to 1.5 m below the line. What is the current through the line?

A wire placed along east, west direction carries a current of 5A from west to east direction. Determine the magnetic field due to a 1.8 cm piece of wire at a point 150 cm north, east from the piece?

An electric current is flowing due south along a power line. What is the direction of magnetic field (i) above it and (ii) below it ?

A long straight wire in the horizontal plane carries a current of 50 A in north to south direction. Give the magnitude and direction of B at a point 2.5 m east of the wire

What is the difference observed in the direction of magnetic field lines on reversing the current through the solenoid ?

A moving charge can produce a magnetic field. Draw the magnetic field lines for a current loop to support your answer.

A proton enter a magnetic field 1.25 T with a velocity 1.5 xx 10^(7) m/s with 30^(o) angle with the field. Find the force on the proton?

A uniform field equal to 1.5T exists in a cylindrical region of radius 10.0cm, its direction parallel to the axis along east to west. A wire carrying current 7.0A in the north to south direction passes through this region. What is the magnitude and direction of the force on the wire if : the wire intersects the axis.