Current

Current

1. Electrons move from the negative terminal of a battery to the positive terminal of a battery.This movemnt of electrons is called current

   • Unit for current:current is measured in ampere(A).A.K.A amp.Also the symbol for current is I
     • Conventional current is the opposite of the current definition
       • Current is the electrons flowing along the wire

2. Potential difference(voltage) is a measure of the ability of the charges to do a particular task.e.g get from place to place

   • N.B. another word for ability is potential
     • Voltage is measured in Volts (V)

3. The opposition to the flow of electrons is called resistance.ex copper is a good conductor of electricity because it has low resistance

   • resistance is measured in the ohm,(the symbol is the greek word omega or R)
     • the formula for current is I=V X R

4. Current only flows in a complete circuit

   • Remember symbols used in electricity
   • remember experiment:to show electrical conduction in different materials and classify each as conductor or insulator
   • Remember experiment to prove ohm's law