Question

True or False

A + charge initially moving west through the earths magnetic field along the equator will fall faster than if it is moving east.

A charged particle moving perpendicular to a uniform B field will move on a circular path.

The magnetic field lines enter the north poles of a bar magnet and leave the south poles and are continuous inside the magnet.

Two antiparallel currents repel each other.

Two antiparallel currents attract.

The direction of the magnetic dipole moment of a flat current carrying coil is perpendicular to the flat surface of the coil and positive for a counter clockwise current.

Answer 1

True : A charged particle moving perpendicular to a uniform B field will move on a circular path.

(In this case, the magnetic force is also perperndicular to the velocity and B field vector which results into circular motion)

False : The magnetic field lines enter the north poles of a bar magnet and leave the south poles and are continuous inside the magnet.

( The magnetic lines of force are assumed to emanate from the north pole of a magnet, pass through surrounding space, and enter the south pole. The lines of force then travel inside the magnet from the south pole to the north pole, thus completing a closed loop).

True : Two antiparallel currents repel each other.

(when a conductor carries current, it creates a magnetic field in a certain direction, now keep another conductor parallel to it but send the current in opposite direction this creates a magnetic field, when the two opposite fields directions intersect they create a repulsive force as the field returns to original shape as it was before it was force to intersect with another field, now u can use a right hand grip rule and find out for yourself, the magnetic fields rotate in opposite directions, its like bringing two like poles together. )

False : Two antiparallel currents attract.

True : The direction of the magnetic dipole moment of a flat current carrying coil is perpendicular to the flat surface of the coil and positive for a counter clockwise current.

( The direction of the magnetic moment is perpendicular to the current loop in the right-hand-rule direction, the direction of the normal to the loop in the illustration)