A piece of wool can become positively charged when they donate their electrons but negatively charged when they accept electrons from another material.
A piece of wool is a type of material that can either accept or donate charged electrons.
A positively charged material can donate it's electrons freely when rubbed against a neutral material.
A negatively charge material will accept electrons when rubbed against a positive charged particle.
A piece of wool can become positively charged in some situations and negatively charged in others situations.
This is because a piece of wool can become positively charged when they donate their electrons but negatively charged when they accept electrons from another material.
Learn more about charged materials here:
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