Unit 3 Topic 1 - Electromagnetism Flashcards
Define Coulomb’s Law
It is an experimental law of physics that quantifies the amount of force between two electrically charged particles not undergoing motion.
What does Coulomb’s Law describe
It is a force of attraction or repulsion in a straight line directly proportional to the product of the two charges and inversely proportional to the square of the distance.
Define Electric Field
A physical field that surrounds electrically charged particles and exerts force on all other charged particles in the field, either attracting or repelling them.
Define Electric Field Strength
The strength of the electric field (E) at any point defined as the electric or coulomb force per unit.
Define Electric Potential
The amount of work energy needed to move a unit of electric charge from a reference point to the specific point in an electric field.
Define Magnetic Field
A vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials.
What’s special about a moving electric charge?
A moving electric charge generates a magnetic field.
What experiences a force when placed inside a magnetic field?
Electric current carrying conductors and moving electric particles.
Define Magnetic Flux
A measurement of total magnetic field which passes through a given area.
Define Magnetic Flux Density
The amount of magnetic flux through a unit of magnetic flux perpendicular to the magnetic field.
Define Electromagnetic Induction
The production of an electromotive force across an electrical conductor in a changing field.
Define Electromagnetic Force
The explanation of how both moving and stationary charged particles interact, the magnetic force acting between said charged particles.
Define Faraday’s Law
The law states that the induced voltage in a circuit is proportional to the rate of change over time of the magnetic flux through a circuit.
Define Lenz’s Law
The law states the direction of the electric current which is induced in a conductor by a changing magnetic field is such that the magnetic field created by the induced current opposes changes in the initial magnetic flux.
Why is Lenz’s Law consistent with the principle of conservation of energy?
The mechanical energy spent in doing work, against the opposing force experienced by a moving magnet, is transformed into electrical energy due to which current flows in the solenoid.
