- #1
rizwankhalil
- 1
- 1
Hi
Q 1 An electrified rod attracts pieces of paper. After a while these papers fly away. Why?
My Answer: Due to the phenomenon of electrostatic induction, the paper becomes charged and will be attracted towards the rod. After some time, the charge becomes neutral and paper flies.
Q 2 How much negative charge has been removed from a positively charged electroscope if it has a charge of 7.5 x 10-11 C?
My Answer: According to phenomenon of electrostatic induction, the amount of charge induces will be equal to amount of charge displaced. So - 7.5 x 10-11 C has been removed from a positively charged electroscope if it has a charge of 7.5 x 10-11 C.
Q 3 Rubber tires get charged from friction with the road. What is the polarity of the charge?
My Answer: Tires will acquire negative charges due to friction between Earth and tires. Electrons are transferred from Earth to rubber tires.
Q 4 Explain why, a glass rod can be charged by rubbing when held by hand but an iron rod can’t be charged by rubbing, if held by hands?
My Answer: Since glass is an insulator so when it is charged by rubbing, charges doesn’t move towards Earth via human body. While iron is a conductor so when it is charged by rubbing, charges move towards the Earth via human body.
Guide me in this regard.
Riz
Q 1 An electrified rod attracts pieces of paper. After a while these papers fly away. Why?
My Answer: Due to the phenomenon of electrostatic induction, the paper becomes charged and will be attracted towards the rod. After some time, the charge becomes neutral and paper flies.
Q 2 How much negative charge has been removed from a positively charged electroscope if it has a charge of 7.5 x 10-11 C?
My Answer: According to phenomenon of electrostatic induction, the amount of charge induces will be equal to amount of charge displaced. So - 7.5 x 10-11 C has been removed from a positively charged electroscope if it has a charge of 7.5 x 10-11 C.
Q 3 Rubber tires get charged from friction with the road. What is the polarity of the charge?
My Answer: Tires will acquire negative charges due to friction between Earth and tires. Electrons are transferred from Earth to rubber tires.
Q 4 Explain why, a glass rod can be charged by rubbing when held by hand but an iron rod can’t be charged by rubbing, if held by hands?
My Answer: Since glass is an insulator so when it is charged by rubbing, charges doesn’t move towards Earth via human body. While iron is a conductor so when it is charged by rubbing, charges move towards the Earth via human body.
Guide me in this regard.
Riz
