What is the difference between charging by conduction and charing by induction?

Question

Also, what is the difference in results when a charged rod comes close to an electroscope instead of when the rod touches the electroscope? If you could explain how to charge a conductor negatively when you only have a positively charged rod that would be great. I'm just having trouble understanding when protons and electrons either come to the surface or move farther back.

Answer 1

Charging by conduction requires contact between two objects. Charge is transferred directly from one object onto the other. Charging by induction is done without contact and solely by causing charges to move about in one object by the electric and magnetic fields produced in the other object.



Charges are always repelled by the same charge and attracted to the opposite. If you have a positively charged rod then it will attract negative charges to the closest point on the other rod. If you provide that rod with a ready source of charge such as your hand then it will become overall negatively charged. Take away your hand and it will remain negatively charged even after the positive rod is removed because the charge can't get away. This is inductive charging at its simplest.



If you had touched the positively charged rod to the other rod then charge would have flowed and it would have gained a positive charge by conduction.

Answer 2

Charging By Conduction

Answer 3

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RE:

What is the difference between charging by conduction and charing by induction?

Also, what is the difference in results when a charged rod comes close to an electroscope instead of when the rod touches the electroscope? If you could explain how to charge a conductor negatively when you only have a positively charged rod that would be great. I'm just having trouble...

Answer 4

Charging by Induction:-

1. No physical contact.

2. No exchange of charge.

Charging by conduction:-

1. Two objects must be in physical contact.

2.Transfer of charge takes place.





Difference between charging by induction and charging by conduction:

Induction

Conduction

1. In this process there is no physical contact between the objects.

1. The conducting surface is connected to a charged object to transfer the charge.

2. The net charge on the object is zero since equal amount of opposite charge is accumulated on the side away from the side where a charge is induced.

2. The net charge on the object changes after the charging process since there is a transfer of charge.

Answer 5

For charging by induction

1. the charged object never touched the object being charged.

2. the charged object does not lose or gain electrons

3. the charged object just polarizes the object being charged

4. object being charged receives charges opposite to the polarity of the charged body.



but for charging by conduction

1. there is electrical contact between the two bodies.

2. the charges on the charged body are transferred to the object being charged.

3. thus the charges on the charged body decreases.

4. the charges gained by the object being charged can never exceed that of the charged body

5. the two bodies may assume the same amount of charges only if they are identical(mass and size)

Answer 6

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You have not indicated what you mean by "charging", but transfer of charge by conduction requires a direct conductive connection, while charging by induction means transferring a charge with no physical connection, just coupling via magnetic field. Inductive coupling must be AC, while conductive coupling could be DC or AC.

Answer 7

nothing