Question

conduct an experiment and collect data to show the effect of changing the polarity of the bar magnet on the strength (magnitude) and direction of the magnetic field. select the statement that correctly describes what happens to the magnetic field when the polarity of the bar magnet is changed. it does not change strength or direction. it changes strength and direction. it changes strength. it does not affect direction. it does not change strength. it does change direction.

Explanation:

The strength of a bar - magnet's magnetic field is determined by its magnetic moment and distance from the magnet, and changing the polarity (swapping north and south poles) does not change the magnetic moment magnitude. The direction of the magnetic field lines, however, is from the north - pole to the south - pole outside the magnet, so when the polarity is reversed, the direction of the magnetic field changes.

Answer:

It does not change strength. It does change direction.