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Questions and Answers
What is the result of charging a conductor by induction?
What is the result of charging a conductor by induction?
- The conductor gains a charge with the opposite sign as the charged object (correct)
- The conductor remains neutral
- The conductor gains a charge with the same sign as the charged object
- The conductor gains the same charge as the charged object
What is the purpose of connecting the conductor to ground during charging by induction?
What is the purpose of connecting the conductor to ground during charging by induction?
- To maintain the charge on the conductor
- To increase the charge on the conductor
- To prevent induction from occurring
- To neutralize the charge on the conductor (correct)
What happens to the transferred electrons in the conductor after the ground connection is removed?
What happens to the transferred electrons in the conductor after the ground connection is removed?
- They flow back to ground
- They remain in the conductor (correct)
- They attach to the charged object
- They disappear
How does a positively charged object affect a neutral metal sphere during charging by conduction?
How does a positively charged object affect a neutral metal sphere during charging by conduction?
What role does ground play in the process of electrostatic charging by induction?
What role does ground play in the process of electrostatic charging by induction?
In the context of charging by conduction, what happens when a charged object is removed from a neutral metal sphere?
In the context of charging by conduction, what happens when a charged object is removed from a neutral metal sphere?
What is the term used to describe the phenomenon where electric charges accumulate more at sharper points on a charged object?
What is the term used to describe the phenomenon where electric charges accumulate more at sharper points on a charged object?
In which scenario can a charged needle act as an electron spray-gun?
In which scenario can a charged needle act as an electron spray-gun?
What causes lightning to occur during a thunderstorm?
What causes lightning to occur during a thunderstorm?
What is the significance of overcoming the insulating properties of air in relation to lightning formation?
What is the significance of overcoming the insulating properties of air in relation to lightning formation?
What is the function of a gold leaf electroscope in terms of electric charge detection?
What is the function of a gold leaf electroscope in terms of electric charge detection?
How does a bolt of lightning lead to the formation of thunder?
How does a bolt of lightning lead to the formation of thunder?
How can an object become charged according to the text?
How can an object become charged according to the text?
Which method of charging involves rubbing two neutral objects together?
Which method of charging involves rubbing two neutral objects together?
What happens when a glass rod is rubbed with silk according to the text?
What happens when a glass rod is rubbed with silk according to the text?
How do moving vehicles become charged according to the text?
How do moving vehicles become charged according to the text?
What kind of charges are produced on an ebonite rod when it is rubbed with fur?
What kind of charges are produced on an ebonite rod when it is rubbed with fur?
Which method of charging involves objects staying in contact with each other?
Which method of charging involves objects staying in contact with each other?
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Study Notes
Charging by Induction
- Charging a conductor by induction results in the transfer of electrons from the ground to the conductor.
- Connecting the conductor to ground during charging allows the excess electrons to be transferred, neutralizing the conductor.
- After the ground connection is removed, the transferred electrons remain in the conductor, making it negatively charged.
Charging by Conduction
- A positively charged object can transfer its excess electrons to a neutral metal sphere, making the sphere positively charged.
- When a charged object is removed from a neutral metal sphere, the sphere retains its acquired charge.
- Charging by conduction involves direct contact between two objects, allowing the transfer of electrons from one to the other.
Electric Charge and Phenomena
- The phenomenon where electric charges accumulate more at sharper points on a charged object is known as electric charge concentration.
- A charged needle can act as an electron spray-gun in the presence of a strong electric field.
- Lightning occurs during a thunderstorm when there is a buildup of electrical charges between the clouds and the ground, eventually overcoming the insulating properties of air and creating a spark.
Lightning and Thunder
- Overcoming the insulating properties of air is crucial for lightning formation, as it allows the electrical discharge to occur.
- A bolt of lightning leads to the formation of thunder as the rapid expansion of air creates a shockwave that produces sound waves.
Electric Charge Detection
- A gold leaf electroscope is used to detect electric charges, as it is sensitive to even small changes in electric charge.
Methods of Charging
- An object can become charged through induction, conduction, or friction.
- Rubbing two neutral objects together, such as a glass rod and silk, can transfer electrons and create a charge.
- Moving vehicles can become charged due to friction with the air.
- Rubbing an ebonite rod with fur produces negative charges on the rod.
- Charging by conduction involves direct contact between two objects, while charging by induction involves the transfer of electrons through a ground connection.
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