Charge a insulated metal sphere with a negative charge rod

In summary, charging an insulated metal sphere with a negative charge rod gives the sphere a net negative charge, which can be useful for experiments and creating an electric field. The negative charge rod is brought close to the sphere without touching it, causing the electrons to move to the opposite side and leaving a net negative charge. The charge on the sphere can be reversed by using a positive charge rod. The amount of charge on the sphere affects its behavior in terms of the strength of its electric field. It is possible to charge an insulated metal sphere with a negative charge rod even if it is already charged with a positive charge.
  • #1
phoebus
4
0
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.
 
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  • #2
Does your textbook say anything about "charging by induction?"
 
  • #3


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!
 

1. What is the purpose of charging an insulated metal sphere with a negative charge rod?

The purpose of charging an insulated metal sphere with a negative charge rod is to give the sphere a net negative charge. This can be useful for various experiments and applications, such as studying electrical forces or creating an electric field.

2. How is the insulated metal sphere charged with a negative charge rod?

The negative charge rod is brought close to the insulated metal sphere without touching it. The negative charges on the rod will repel the electrons in the sphere, causing them to move to the opposite side of the sphere, leaving a net negative charge on the sphere.

3. Can the charge on the insulated metal sphere be reversed?

Yes, the charge on the insulated metal sphere can be reversed by using a positive charge rod instead of a negative one. This will cause the electrons in the sphere to move towards the positive charge, neutralizing the net negative charge.

4. How does the amount of charge on the insulated metal sphere affect its behavior?

The amount of charge on the insulated metal sphere affects its behavior in terms of the strength of its electric field. The greater the amount of charge, the stronger the electric field will be, and the greater the force on any charged particles placed near the sphere.

5. Is it possible to charge an insulated metal sphere with a negative charge rod if it is already charged with a positive charge?

Yes, it is possible to charge an insulated metal sphere with a negative charge rod even if it is already charged with a positive charge. The negative charge rod will simply neutralize the positive charge on the sphere, leaving a net negative charge.

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