All Flashcards
What is the effect of rubbing a balloon on hair?
The balloon becomes negatively charged (gains electrons), and the hair becomes positively charged (loses electrons).
What is the effect of touching a charged object to a neutral object?
Charge transfers from the charged object to the neutral object, resulting in both objects having the same type of charge.
What is the effect of bringing a charged object near a neutral conductor?
Charges within the conductor redistribute, creating a polarized object (induced charge separation).
What is the effect of grounding a charged object?
Excess charge flows to or from the Earth until the object becomes neutral.
What is the effect of increasing the distance between two charged objects?
The electrostatic force between them decreases (inversely proportional to the square of the distance, according to Coulomb's Law).
Define 'charging' in electrostatics.
Charging is the process of redistributing electrons between objects, not creating charge.
What is 'conservation of charge'?
The total charge in an isolated system remains constant; charge is neither created nor destroyed, only transferred.
Define 'grounding'.
Connecting a charged object to the Earth, allowing excess charge to flow away and neutralize the object.
What is 'induced charge separation'?
Bringing a charged object near a neutral one, causing the charges within the neutral object to shift, creating a polarized object without direct contact.
Define 'electric force'.
The attractive or repulsive force between charged objects, governed by Coulomb's Law.
What are the steps involved in charging by friction?
- Rub two materials together. 2. Electrons transfer from one material to the other. 3. One material becomes negatively charged, the other positively charged.
What are the steps involved in charging by contact?
- Bring a charged object into contact with a neutral object. 2. Charge transfers from the charged object to the neutral object. 3. Both objects now have the same type of charge.
What are the steps involved in charging by induction?
- Bring a charged object near a neutral conductor. 2. Charges in the conductor separate (polarization). 3. Ground the conductor to allow charge to flow to or from the Earth. 4. Remove the ground, then remove the charged object. 5. The conductor is now charged.
What are the steps to determine the electrostatic force between two charged spheres?
- Determine the magnitude and sign of each charge ( and ). 2. Measure the distance (r) between the centers of the spheres. 3. Use Coulomb's Law: where .
What are the steps to grounding a charged object?
- Connect the charged object to the Earth via a conductive path. 2. Excess charge flows to or from the Earth. 3. The object becomes neutral.