Define 1 Ampere

Define 1 Tesla

Define 1 Weber

Force between two charges is governed by Ampere's law.

A cell of emf E and internal resistance r drives a current of 5 Ampere through an extenal resistance of 8 ohm. The current drops to 4 Ampere when the external resistance is increased to 10.1 ohm. Find the emf E and the internal resistance r of the cell.

Define 1 electronvolt. Deduce the relationship between Joule and eV.

Define 1 Gauss