Mike wants to negatively charge a small rubber ball. Which of these methods would successfully charge the ball?
A) heating the ball in boiling water
B) running the ball over a strong magnet
C) rubbing the ball back and forth on carpet
D) dropping the ball from a tall bulding
Answers
In order to negatively charge the ball, Mike should simply rub the ball back and forth on the carpet.
The simple justification for this is the fact that electrons should be transferred if an object is to be charged. Rubbing the ball on the carpet would generate friction.
None of the other methods like heating the ball in boiling water, running the ball over a strong magnet or dropping the ball from a tall building would work in this scenario.
C) Rubbing carpet to and fro on the carpet.
Explanation:
Rubber ball is an insulator which does not conduct electricity. When they are rubbed with carpet which is generally made of wool and silk which are positively charged, it becomes negatively charged material. During the rubbing process, the electron transfer occurs. When it is rubbed and left for some time, then the electrons dissipates.
This is known as charge conservation.
The electron transfer between materials occurs by many ways which are polarization, friction, and so on.