Charge a insulated metal sphere with a negative charge rod

[phoebus]

This is my first question in this forum. And here it is,

How do you make an insulated metal sphere has a net positive charge with a negatively charged rod?

If the rod touches the sphere, the sphere will have negative charge. If I connect sphere to ground, bring the rod near the sphere, negative charge will go to ground, then I have a positively charged sphere?

What is your answer?

Thanks.

 

[jtbell]

Does your textbook say anything about "charging by induction?"

 

[astrokreng]

First of all, welcome to the forum! It's great to have a fellow scientist here.

To answer your question, there are a few different ways to charge an insulated metal sphere with a net positive charge using a negatively charged rod. One method is to use a process called electrostatic induction. This involves bringing the negatively charged rod near the sphere without actually touching it. The negative charge on the rod will repel the electrons in the metal sphere, causing them to move to the opposite side of the sphere. This will leave the side of the sphere near the rod with a net positive charge.

Another method is to use a process called conduction. In this case, you would touch the negatively charged rod to the sphere, allowing the negative charge to transfer to the sphere. Then, you would touch the sphere to ground, which would allow the excess negative charge to flow to the ground, leaving the sphere with a net positive charge.

It's important to note that the amount of charge transferred will depend on the size of the sphere, the distance between the rod and the sphere, and the material of the sphere. So, the exact charge that the sphere will have after being charged with the negatively charged rod may vary.

I hope this helps answer your question. Let me know if you have any further inquiries. Happy experimenting!