All Flashcards
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 differences between charging by contact and charging by induction?
Contact: Requires direct touch, results in the same charge. | Induction: No direct touch, results in opposite charge.
What are the differences between conductors and insulators in the context of charging?
Conductors: Allow charges to move freely. | Insulators: Resist the movement of charges.
What are the differences between positive and negative charges?
Positive: Deficiency of electrons. | Negative: Excess of electrons.
What are the differences between attractive and repulsive electric forces?
Attractive: Occurs between opposite charges. | Repulsive: Occurs between like charges.
What are the differences between charge transfer and charge creation?
Charge Transfer: Movement of existing charges from one object to another. | Charge Creation: Hypothetical process that does not occur in normal electrostatic interactions (violates conservation of charge).
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 (gains electrons), and the other becomes positively charged (loses electrons).
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 end up with the same sign of charge.
What are the steps involved in charging by induction?
- Bring a charged object near a neutral conductor. 2. Charges within the conductor redistribute (induced charge separation). 3. Ground the conductor to allow charge to flow to or from the Earth. 4. Remove the ground connection. 5. Remove the charged object, leaving the conductor with an opposite charge.
What are the steps to solve the equilibrium of charged spheres suspended by threads?
- Draw a free-body diagram for one sphere. 2. Use trigonometry to find the angle of the thread. 3. Set up and solve the equilibrium equation using the angle and mass. 4. Use Coulomb's law to calculate the charge.
What are the steps to solve the electric force between multiple interacting charged objects?
- Identify all the charged objects. 2. Calculate the electric force between each pair of charged objects using Coulomb's law. 3. Determine the direction of each force (attractive or repulsive). 4. Vectorially add the forces to find the net force on each object.