elec

• electrical current is the flow of charge per unit time, measured in amperes
• as resistance increases, current decreases
• resistance is the opposition to the flow of current, measured in ohms
• • length - longer wires have greater resistance
  • thickness - narrower wires have greater resistance
  • material - e.g copper has lower resistance than steel
  • temperature - resistance increases with temperature
• an electric field is the region around an electric charge
• an electric field is a region where charges experience a force
• potential difference is the measure of energy given to charge carriers
• the greater the potential difference the more the current can flow given that the resistance is constant