Maria | Manga ch. 3

1.  When food is digested, heat is produced. So when electricity flows through an electrical resistance, heat is also produced.

2.  Because of thermal emission, as temperature rises the lightbulb becomes brighter.

3.  A superconductor is a material that can conduct electricity with zero resistance below a certain temperature. They can be used as superconducting electromagnets, such as in maglev trains.  Metals can become superconductors at low temperatures.

4.  Ampere's Law states that for any closed loop path, the sum of the length element times the magnetic field in the direction of the length element is equal to the permeability times the electric current enclosed in the loop.

5.  The magnetic fields generated in each wire are combined to generate a magnetic field of twice the current around both conductors. A force of attraction is also generated between the two wires.

6.  A force of repulsion is generated between the wires. The magnetic fields negate each other and become smaller.