0
A glass rod is -vely charge and repel a body of -ve charge .so if a pith ball is repelled ,the charge on it must be -ve.
Wiki User
∙ 13y ago
Add your answer:
Earn +20 pts
How does a substance become temporarily charged by induction when a charged object is brought near?
I'm not 100% sure because were just starting this in class today. Let's say you have a negatively charged ebonite rod and you brought it toward a neutral pithball (if you don't know what that is just picture a shere). Before you brought the rod near the pithball, the protons and electrons in the pithball are spread out evenly. When u bring the negatively charged rod towards the pithball the electrons in the pithball move to the otherside of the ball. The protons never move but are now closer to the negatively charged ebonite rod. So technically, it reacts like a positively charged object would and attrcts to the negative ebonite rod ( unlike charges attract). But once the ebonite rod is moved away from the pithball, the pithball is neutral. The pithball is always neutral because there's no transfer of electrons but I guess it is technically temporarily charged. I'm not sure if that's what your looking for but I hope it helped a bit.
What is a pithball?
It is a very light, nonconducting, substance that is used to demonstrate electrostatic forces. Typically a small amount is hung at the end of a string. When a charged rod is brought close to the pithball it polarizes the pithball molecules. That is, it attracts charges that are opposite the charged rod and repels the like charges. This causes the molecules in the pithball (which has zero net charge) to slightly rotate so the unlike charges are nearer the surface and closer to the rod. When this happens, there is a net attractive electric force on the pithball which causes it to swing (slightly) toward the rod. If the pithball touches the rod it will pick up some charge from the rod. All of a sudden it now has a net charge, which is the same sign as the rod's charges and the pithball will swing (strongly) away from the rod because like charges repel. The pithball was originally made from dried pith, a soft spongy material found in the stems of plants. Nowdays, lots of materials will work; dried corn cob, styrofoam etc. The requirement is that it be lightweight (so it will easily swing when subjected to the electric forces described above).
How a charged rod placed near an uncharged metal object can repel?
Charged rod and an uncharged metal object attract each other because free electrons in metal are either attracted or repelled by the charged rod. If the rod is positively charged then free electrons are attracted towards it and both objects attract each other. If the rod is negatively charged then free electrons are repelled by it and positive ions are attracted by the rod and both objects attract each other.
Why does a glass rod get positively charged when rubbed with rubber?
electrons are transferred from glass to rubber
An electroscope has been charged by induction with the help of a charged glass rod the charge on the electroscope will be?
negative
How does a substance become temporarily charged by induction when a charged object is brought near?
I'm not 100% sure because were just starting this in class today. Let's say you have a negatively charged ebonite rod and you brought it toward a neutral pithball (if you don't know what that is just picture a shere). Before you brought the rod near the pithball, the protons and electrons in the pithball are spread out evenly. When u bring the negatively charged rod towards the pithball the electrons in the pithball move to the otherside of the ball. The protons never move but are now closer to the negatively charged ebonite rod. So technically, it reacts like a positively charged object would and attrcts to the negative ebonite rod ( unlike charges attract). But once the ebonite rod is moved away from the pithball, the pithball is neutral. The pithball is always neutral because there's no transfer of electrons but I guess it is technically temporarily charged. I'm not sure if that's what your looking for but I hope it helped a bit.
When a glass rod charged its placed near small pieces of paper bitsthe paperbits are attracted to the rodthen repelledexplain?
The glass rod aquires static electricity.the paper bits are negatively charged and the glass rod is positively charged.when it battracts the paper ,the both aquire like charges due to which they both are repelled.
What is a pithball?
It is a very light, nonconducting, substance that is used to demonstrate electrostatic forces. Typically a small amount is hung at the end of a string. When a charged rod is brought close to the pithball it polarizes the pithball molecules. That is, it attracts charges that are opposite the charged rod and repels the like charges. This causes the molecules in the pithball (which has zero net charge) to slightly rotate so the unlike charges are nearer the surface and closer to the rod. When this happens, there is a net attractive electric force on the pithball which causes it to swing (slightly) toward the rod. If the pithball touches the rod it will pick up some charge from the rod. All of a sudden it now has a net charge, which is the same sign as the rod's charges and the pithball will swing (strongly) away from the rod because like charges repel. The pithball was originally made from dried pith, a soft spongy material found in the stems of plants. Nowdays, lots of materials will work; dried corn cob, styrofoam etc. The requirement is that it be lightweight (so it will easily swing when subjected to the electric forces described above).
How a charged rod placed near an uncharged metal object can repel?
Charged rod and an uncharged metal object attract each other because free electrons in metal are either attracted or repelled by the charged rod. If the rod is positively charged then free electrons are attracted towards it and both objects attract each other. If the rod is negatively charged then free electrons are repelled by it and positive ions are attracted by the rod and both objects attract each other.
Why are polar liquids always attracted towards the charged rod and not repelled?
because they have a positive and negative end
Will a positively charged glass rod be attracted to a magnet?
no.
Why would a charged balloon be attracted to the charged glass rod?
Due to electrostatic induction
Why does a glass rod get positively charged when rubbed with rubber?
electrons are transferred from glass to rubber
What happens to the rod when it is rub by nylon?
It depends on what the rod is made of. For example, if it's a glass rod the glass will lose electrons to the nylon and become positively charged, and the nylon will gain electrons and become negatively charged. If the rod is made of aluminum or steel, the rod will gain electrons from the nylon and become negatively charged, and the nylon will become positively charged.
Why the charged balloon wiill be attracted to the charged glass rod?
If charge on the balloon is induced due to the charge of the glass rod then there will be opposite charge and so balloon gets attracted by the rod. Unlike charges do attract each other
When a glass rod and fur rubbed together electrons are transferred from the fur to rod. Is the fur charged If any positively or negatively charged How much compared to the rod?
Yes , if elctron goes from fur to rod, fur is positively charged
An electroscope has been charged by induction with the help of a charged glass rod the charge on the electroscope will be?
negative
