A long straight horizontal cable carries a current of 2.5 A in the direction `10^(@)` south of west to `10^(@)` north of east. The magnetic meridian of the place happens to be `10^(@)` west of the geographic meridian. The earth's magnetic field at the location is 0.33 G, and the angle of dip is zero. Locate the line of neutral points (ignore the thickness of the cable) ? (At neutral points, magnetic field due to a current-carrying cable is equal and opposite to the horizontal component of earth's magnetic field?.

A short bar magnet placed in a horizontal plane has its axis aligned along the magnetic north-south direction. Null points are found on the axis of the magnet at 14 cm from the centre of the magnet. The earth's magnetic field at the place is 0.36 G and the angle of dip is zero. What is the total magnetic field on the normal bisector of the magnet at the same distance as the null-point (i.e., 14 cm) from the centre of the magnet ? (At null points, field due to a magnet is equal and opposite to the horizontal component of earth's magnetic field.)

What is the shape of the magnetic field lines around a current carrying straight wire?

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.

In the magnetic meridian of a certain place, the horizontal component of the earth's magnetic field is 0.26 G and the dip angle is 60^(@) . What is the magnetic field of the earth at this location ?

The horizontal component of the earth's magnetic field at a certain place is 2.6 xx 10^(-5) T and the angle of dip is 60^(@) . What is the magnetic field of the earth at this location ?

A horizontal overhead power line carries a current of 90 A in east to west direction. What is the magnitude and direction of the magnetic field due to the current 1.5 m below the line ?

In the magnetic meridian of a certain place the vertical component of the earth's magnetic field is 0.3464 G and the dip angle is 30^(@) . The horizontal component of the earth 's magnetic field at this location is

A short bar magnet placed in a horizontal plane has its axis aligned along the magnetic north-south direction. Null points are found on the axis of the magnet at 14 cm from the centre of the magnet. The earth's magnetic field at the place is 0.36 G and the angle of dip is zero.If the bar magnet is turned around by 180^(@) , where will the new null points be located ?