Electricity
Ohmic Conductors
Ohmic Conductors
Resistivity
Resistivity
Superconductivity
Superconductivity
When some metals are cooled toward absolute zero a transition temperature is reached at which the resistance falls to zero. This is superconductivity when there is no interaction between the free electrons and the lattice.
When some metals are cooled toward absolute zero a transition temperature is reached at which the resistance falls to zero. This is superconductivity when there is no interaction between the free electrons and the lattice.
If an electromagnet has a superconducting coil a huge current can be maintained in it with no loss of energy. This enables a very strong magnetic field to be produced.
If an electromagnet has a superconducting coil a huge current can be maintained in it with no loss of energy. This enables a very strong magnetic field to be produced.
Circuits
Circuits
Potential Dividers
Potential Dividers
EMF & Internal Resistance
EMF & Internal Resistance