ELECTRICAL ENERGY ELECTRICAL ENERGY “ALSO CALLED ELECTRICITY” 2 KINDS OF ELECTRICAL CHARGE 1.NEGATIVE 2.POSITIVE ELECTROMAGNETIC FORCE - the force exerted by the magnetic field created by electricity ELECTROSTATIC FORCE - force between two charges kWh – refers to the total electrical energy that the household consumed for one month. Current (I) - is the rate of flow of electricity. Resistance (R) - is an electrical quantity that measures how the device or material reduces the electric current flow through it. - is measured in units of ohms (Ω). Voltage – the rate at which energy is drawn from a source that produces a flow of electricity in a circuit. 𝐼 𝑣 𝑅(Ω). Example Problem: A nine volt battery supplies power to a cordless curling iron with a resistance of 18 ohms. How much current is flowing through the curling iron? A 110 volt wall outlet supplies power to a strobe light with a resistance of 2200 ohms. How much current is flowing through the strobe light? Find the current I through a resistor of resistance R = 2 Ω if the voltage across the resistor is 6 V.