Pith Ball And A Charged Rod

[donmikolo]

where do you get a charged rod?

[tonymang2]

@donmikolo Go to sciencekit's website and search for friction rods

[ghool10000]

Can U Tell Me Why The Negatuve Rod Is Attracted To The Pith Ball? TY

[tonymang2]

@ghool10000 Click on the link below the video to find out

[misterguy5]

did it just skip from 1:51 to 1:53?

[tonymang2]

@misterguy5 That sometimes happens with youtube videos. Watch it again.

[0787q83yvq87]

five out of five.

[seiya266]

What would've been the case if the rod was positively charged instead of negatively.

I learned in class that protons can not gain or be removed, thus, no protons will be transfered. What will happen in that case?

[tonymang2]

@seiya266 If the rod was positive, the mobile electrons in the pith ball would move to the left due to their attraction to the rod. This would cause the left side of the rod to become negative and the right side to become positive. Since the side closest to the rod is negative, the pith ball would once again move towards the rod and make contact. The pith would then lose electrons to the rod and become positive and, like in the previous scenario, the rod and pith ball would repel..

[seiya266]

@tonymang2 Thanks so much!

I became smarter now :)

[seiya266]

Can you please explain for why for 1 second, the pith ball was being attracted to the rod then repelling?

[tonymang2]

@seiya266 Sure. In the beginning, the negative rod repels the electrons in the neutral pith ball to the the right. This causes the left side of the pith ball to obtain a net positive charge. Since opposite charges attract, the pith ball is attracted to the rod. When they touch, electrons are transferred to the pith ball giving it a net negative charge. Since the rod remains negative even after the transfer, it repels the negatively charged pith ball.

[adog1232]

Thumbs up :)