All Flashcards
Compare and contrast test charge 'q' and source charge 'Q'.
Test charge 'q': Used to measure the electric field; its own field is negligible. Source charge 'Q': Creates the electric field.
Compare the electric field strength () due to a point charge and between parallel plates.
Point Charge: varies with distance (). Parallel Plates: is uniform between the plates.
What is the effect of increasing the distance between two charges on the electrostatic force?
The electrostatic force decreases, inversely proportional to the square of the distance.
What is the effect of placing a positive charge in an electric field?
The positive charge experiences a force in the direction of the electric field.
What is the effect of placing a negative charge in an electric field?
The negative charge experiences a force opposite to the direction of the electric field.
What happens to the electric field strength as the density of electric field lines increases?
The electric field strength increases.
What is the effect of increasing the magnitude of either charge in Coulomb's Law?
The magnitude of the electrostatic force increases proportionally.
Define electrostatic force.
The fundamental force governing interactions of charged particles.
What is Coulomb's Law?
The mathematical expression that quantifies the electrostatic force between two point charges: F = k rac{|q_1 q_2|}{r^2}
Define electric field.
The field created by a charged object that exerts a force on any other charge placed within it.
Define electric field strength.
The force per unit charge experienced by a test charge in an electric field: E = rac{F}{q}
What is a test charge?
A small charge used to measure the electric field without significantly altering the field itself.
What is a source charge?
The charge that creates the electric field.