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What are the differences between Gravitational Force and Electromagnetic Force?
Gravitational Force: Always attractive, weaker at short distances, acts on all matter | Electromagnetic Force: Attractive or repulsive, stronger at short distances, acts only on charged particles
What is the difference between Scalar and Vector Fields?
Scalar Field: Assigns a single value (e.g., temperature) | Vector Field: Assigns a vector (e.g., velocity, force)
What happens when like charges are brought near each other?
They repel each other due to electric force.
What happens when opposite charges are brought near each other?
They attract each other due to electric force.
What happens when the distance between two charges increases?
The electric force between them weakens rapidly.
What happens when a positively charged particle moves in the direction of an electric field?
Its electric potential energy decreases.
What happens to the angle ฮธ if the mass of the sphere is doubled in the free response question?
The angle ฮธ decreases.
What are the steps of charging by friction?
Rubbing objects together transfers electrons, creating charged objects.
What are the steps of charging by conduction?
Direct contact allows electrons to flow, equalizing charges.
What are the steps of charging by induction?
Bringing a charged object near a neutral one redistributes charges within the neutral object.
How do you apply Coulomb's Law?
Identify the charges (q1, q2), measure the distance (r) between them, and use the formula: $F = k * \frac{|q1 * q2|}{r^2}$