Electricity
The flow of electric current through a conductor, such as a wire.
What Is Electricity?
The sum of all currents entering a junction must equal the sum of all currents exiting that junction.
What is Kirchhoff’s current law?
force field surrounding magnetic objects.
What is Magnetic Force
one of two types of electric charge. See also positive charge.
What is Negative Charge?
machine that transforms or converts electrical energy into mechanical energy.
What is an Electric Motor
A device that transforms or converts chemical energy into electrical energy or electric current.
What is a Battery.
sum of the voltage drops (voltage differences) around a closed loop equals zero.
What is Kirchhoff’s voltage law
two regions in a magnetic field, called magnetic north and south poles, that produce the strongest magnetic force.
What are Magnetic Poles
fundamental property of matter that comes in two varieties we call positive and negative.
What is Electric Charge
scientific instrument used to measure the masses of individual atoms in a gas using the force exerted on them in a uniform magnetic field.
What is aa Mass Spectrum
A material, such as a metal, that offers low resistance to the flow of electric current.
What is an Electrical Conductor?
current in an electric circuit is proportional to the voltage applied and inversely proportional to the resistance, or I = V/R.
What is an Ohm's Law
the arrows that depict the direction of the magnetic force in a magnetic field.
What are Magnetic Field Lines
A fundamental force that charged objects exert on each other.
What is Electric Force.
device attached to the armature of a motor (or generator) that provides an electrical connection and allows the direction of current to be changed periodically during the rotation of the motor.
What is a commutator?
A unit of electric potential and electric potential difference.
What is Volt (V).
direction of the current induced in a wire is such that the current’s induced magnetic field opposes the change in magnetic field that originally induced the current.
What is Lenz's Law
A scientific instrument used to detect charged objects.
What is Electroscope
force exerted on an object in a magnetic field
What is Magnetic Force?
machine that converts rotational motion to electricity
What is an Electrical Generator?
An electric circuit where the electric current has only one path.
What is a Series Circuit?
changing magnetic flux through a coil of wire will induce an emf in the wire that is proportional to the number of loops and the rate of change of the magnetic field.
Faraday's Law of Induction
A property of a material that describes its ability to exert a force on a magnet or a magnetic material.
Magnetic
one of two types of electric charge. See also negative charge.
What is Positive Charge
instrument used to detect very small electric currents by detecting the magnetic force on a loop of wire.
What is a Galvanometer