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Charging a metal sphere by contact using a positively charged rod, followed by grounding can result in ________ charge in a metal sphere.
  • a)
    positive
  • b)
    Zero
  • c)
    positive or negative depending on which end is grounded
  • d)
    negative
Correct answer is 'B'. Can you explain this answer?
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Charging a metal sphere by contact using a positively charged rod, fol...
The charge on the rod is shared between the rod and the sphere when they are in contact with each other. However, on grounding the charge will flow to the earth and the charge on the sphere becomes zero
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Charging a metal sphere by contact using a positively charged rod, fol...
When u bring a (+)ve charged rod near a metallic sphere the electron start to accumulat at that side of the sphere (causing that side of sphere to get partial (-)ve charge) while the other side gains a (+) charge when it is grounded or earthed the charge flows from conducter to earth and net charge becomes zero on the surface of conducter U can study this in detail in h c verma its an important topic
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Charging a metal sphere by contact using a positively charged rod, fol...
Charging a Metal Sphere by Contact
To understand the process of charging a metal sphere by contact using a positively charged rod followed by grounding, we need to consider the transfer of charge between objects.

Positive Charge Transfer
When a positively charged rod comes into contact with a neutral metal sphere, electrons from the sphere are attracted to the rod, leaving the sphere with a net positive charge. This is because electrons are negatively charged and will move away from the positively charged rod.

Grounding Process
After the metal sphere has been positively charged, grounding it involves connecting it to the Earth. Since the Earth is a vast reservoir of charges, it can supply or accept electrons easily.

Resulting Charge in the Metal Sphere
When the positively charged metal sphere is grounded, electrons from the Earth flow into the sphere to neutralize the positive charge. This results in the metal sphere having a zero net charge.
Therefore, the correct answer is 'Zero' because the metal sphere ends up with no net charge after the process of charging by contact using a positively charged rod followed by grounding.
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Read the following text and answer the following questions on the basis of the same: Tribo-electric series: The tribo-electric series is a list that ranks materials according to their tendency to gain or lose electrons. The process of electron transfer as a result of two objects coming into contact with one another and then separating is called tribo-electric charging. During such an interaction, one of the two objects will always gain electrons (becoming negatively charge d) and the other object will lose electrons (becoming positively charged). The relative position of the two objects on the tribo-electric series will define which object gains electrons and which object loses electrons.In tribo-electric series, materials are ranked from high to low in terms of the tendency for the material to lose electrons. If an object high up on this list (Glass, for exampl e) is rubbed with an object low down on the list (Teflon, for example), the glass will lose electrons to the teflon. The glass will, in this case, become positively charged and the teflon will become negatively charged. Materials in the middle of the list (steel and wood, for example) are items those do not have a strong tendency to give up or accept electrons.If human hair is rubbed with amber, how those will be charged?

Read the following text and answer the following questions on the basis of the same:Tribo-electric series: The tribo-electric series is a list that ranks materials according to their tendency to gain or lose electrons. The process of electron transfer as a result of two objects coming into contact with one another and then separating is called tribo-electric charging. During such an interaction, one of the two objects will always gain electrons (becoming negatively charge d) and the other object will lose electrons (becoming positively charged). The relative position of the two objects on the tribo-electric series will define which object gains electrons and which object loses electrons. In tribo-electric series, materials are ranked from high to low in terms of the tendency for the material to lose electrons. If an object high up on this list (Glass, for exampl e) is rubbed with an object low down on the list (Teflon, for example), the glass will lose electrons to the teflon. The glass will, in this case, become positively charged and the teflon will become negatively charged. Materials in the middle of the list (steel and wood, for example) are items those do not have a strong tendency to give up or accept electrons.The object which loses electrons becomes _____ charged and the object gains electrons becomes ______ charged.

Charging a metal sphere by contact using a positively charged rod, followed by grounding can result in ________ charge in a metal sphere.a)positiveb)Zeroc)positive or negative depending on which end is groundedd)negativeCorrect answer is 'B'. Can you explain this answer?
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