Physics paper 2 definitions

Cards (14)

What is internal energy?
The sum of the randomly distributed kinetic energies and potential energies in a body
What is a force field? 
A region in which a body experiences a non contact force
What is gravity?
A universal attractive force acting between all matter
What is gravitational potential?
The work done per unit mass to move a small test object from infinity to that point
What is Gravitational potential difference?
The energy required to move a point mass between two points
What is gravitational field strength?
Force per unit mass on a small test charge
What is electric field strength?
The force per unit charge on a positive test charge placed at that point
What is capacitance??
X amount of charge is stored by a capacitor per unit of potential difference
What is dielectric constant?
permittivity of medium / permittivity of free space
What is the Tesla?
The unit of magnetic flux density - The force on a wire (N) per metre of wire length (m) per ampere of current (A)
What is magnetic flux?
The magnetic flux density x area
What is Lenz’s Law?
The direction of induced emf acts to oppose the change that is causing it
What is Faraday’s law?
The magnitude of induced emf is equal to the rate of change of magnetic flux linkage
What is the typical value of the nuclear radius?
1.2 x 10^-15