Electricity And Magnetism Flashcards
State the Law of Conservation of Charge
Charges cannot be created or destroyed, but are separated and transferred from one object to another. The net charge of an isolated system remains constant
State Coulombs Law
The electrostatic force between two point charges is directly proportional to the product of the charges and inversely proportional to the squared distance between them
What is electrostatics
The interactions of stationary charges
Define conservation of charge
Every charge in the universe is an integer multiple of the charge of one electron
Define electric field
A region of space in which an electric charge experiences a force
What are electric field lines
A way of representing an electric field, they indicate direction
Define the right hand rule
If the thumb is in the direction of the current, the curled fingers will be in the direction of the magnetic field around the conductor
Define solenoid
Coil of many loops of wire that are wound to look like a cylinder
State Lenz’s Law
The induced current flows in a direction so as to set up a magnetic field to oppose the charge in magnetic flux
Define magnetic flux
How much field passes through an area
Define magnetic flux linkage
A magnetic flux that is linked with a particular object
Define magnetic flux density
A measure of the strength and direction of the magnetic field
State Faraday’s Law of Induction
An emf is induced in a conductor when the magnetic field surrounding it changes. The size of the induced emf is directly proportional to the rate of charge of magnetic flux linkage
State Ohm’s Law
The potential difference across a conductor is directly proportional to the current through it, if temperature remains constant
Define equivalent resistance
Resistance of a single resistor that can take the place of a number of resistors joined together
Define power
The rate at which electrical energy is converted to other forms of energy in an electrical circuit
