**GLOSSARY**

**GLOSSARY**

Coulomb - the SI unit of electric charge; symbol

Coulomb's Constant - the proportionality constant,

Coulomb's Law - the force between two point charges is inversely proportional to the square of the distance between the charges and directly proportional to the product of the charges

Electric Field - the region in which a force is exerted on an electric charge; the electric force per unit positive charge; unit is N/C

Electric Field Lines - a force with magnitude and direction that acts between two charged particles

Electric Potential - the value, in volts, of potential energy per unit positive charge for a given point in an electric field; 1 V = 1 J/C

Electric Potential Difference - the amount of work required per unit charge to move a positive charge from one point to another in the presence of an electric field

Electric Potential Due to a Point Charge - the electric potential is inversely proportional to the distance from the charge and proportional to the amount of charge producing the field

Electric Potential Energy - the energy stored in a system of two charges a distance apart, or the energy stored in an electric field that can do work on a positively charged particle

Field Theory - a scientific model that describes forces in terms of entities that exist at every point in space

Force of Gravity - the force of attraction between all objects due to mass

Gravitational Constant - a constant that appears in the universal law of gravitation; the constant is written as

Gravitational Field - a collection of vectors, one at each point in space, that determines that magnitude and direction of the gravitational force

Gravitational Field Strength - the magnitude of the gravitational field vector at a point in space

Gravitational Potential Energy - stored energy an object has because of its position and the applied gravitational force

Magnetic Field Line - one of a set of lines drawn to indicate the strength and direction of a magnetic field

Principle of Electromagnetism - moving electric charges produce a magnetic field

Right-hand Rule for a Moving Charge in a Magnetic Field - if you point your right thumb in the direction of the velocity of the charge, and your straight fingers in the direction of the magnetic field, then your palm will point in the direction of the resulting magnetic force

Right-hand Rule for a Solenoid - if you coil the fingers of your right hand around a solenoid in the direction of the conventional current, your thumb points in the direction of the magnetic field lines in the centre of the coil

Right-hand Rule for a Straight Conductor - if your right thumb is pointing in the direction of conventional current, and you curl your fingers forward, your curled fingers point in the direction of the magnetic field lines

Satellite - an object or a body that revolves around another body due to gravitational attraction

Uniform Circular Motion - the motion of an object with a constant speed along a circular path of constant radius

Universal Law of Gravitation - there is a gravitational attraction between any two objects; if the objects have masses

*C*Coulomb's Constant - the proportionality constant,

*k,*in Coulomb's lawCoulomb's Law - the force between two point charges is inversely proportional to the square of the distance between the charges and directly proportional to the product of the charges

Electric Field - the region in which a force is exerted on an electric charge; the electric force per unit positive charge; unit is N/C

Electric Field Lines - a force with magnitude and direction that acts between two charged particles

Electric Potential - the value, in volts, of potential energy per unit positive charge for a given point in an electric field; 1 V = 1 J/C

Electric Potential Difference - the amount of work required per unit charge to move a positive charge from one point to another in the presence of an electric field

Electric Potential Due to a Point Charge - the electric potential is inversely proportional to the distance from the charge and proportional to the amount of charge producing the field

Electric Potential Energy - the energy stored in a system of two charges a distance apart, or the energy stored in an electric field that can do work on a positively charged particle

Field Theory - a scientific model that describes forces in terms of entities that exist at every point in space

Force of Gravity - the force of attraction between all objects due to mass

Gravitational Constant - a constant that appears in the universal law of gravitation; the constant is written as

*G*Gravitational Field - a collection of vectors, one at each point in space, that determines that magnitude and direction of the gravitational force

Gravitational Field Strength - the magnitude of the gravitational field vector at a point in space

Gravitational Potential Energy - stored energy an object has because of its position and the applied gravitational force

Magnetic Field Line - one of a set of lines drawn to indicate the strength and direction of a magnetic field

Principle of Electromagnetism - moving electric charges produce a magnetic field

Right-hand Rule for a Moving Charge in a Magnetic Field - if you point your right thumb in the direction of the velocity of the charge, and your straight fingers in the direction of the magnetic field, then your palm will point in the direction of the resulting magnetic force

Right-hand Rule for a Solenoid - if you coil the fingers of your right hand around a solenoid in the direction of the conventional current, your thumb points in the direction of the magnetic field lines in the centre of the coil

Right-hand Rule for a Straight Conductor - if your right thumb is pointing in the direction of conventional current, and you curl your fingers forward, your curled fingers point in the direction of the magnetic field lines

Satellite - an object or a body that revolves around another body due to gravitational attraction

Uniform Circular Motion - the motion of an object with a constant speed along a circular path of constant radius

Universal Law of Gravitation - there is a gravitational attraction between any two objects; if the objects have masses

*m1*and*m2*and their centres are separated by a distance*r*, the magnitude of the gravitational force on either object is directly proportional to the product of*m1*and*m2*and inversely proportional to the square of*r*