Notes –
Energy is measured in ______(yes, we studied this during our heat unit when we burned the peanut), or in Joules (metric system). When measuring electrical energy we always use ______.
Voltage (V) is the charge (______) that is stored in a battery.
Voltage is measured in ______.
· If a battery has 6 volts of energy, it has _____ Joules for every coulomb of ______moving through the wires.
· In a series circuit, there is only ______path for the coulombs to travel, so each part of the circuit must ______the 6 Joules.
· In a ______ circuit, there are 2 or more paths for electrons to move through. ______Coulomb of electrons that travels through each ______path has ______Joules of energy to use.
Current (I) is the ______of electrons flowing through the wires.
Current is measured in ______
· Current of electrons is like the current of a ______. If the creek is flowing ______, all of the water must go ______. If the creek is ______, all of the creek is ______. This is like a ______circuit.
· If the creek is flowing and splits ______an island, ______of the water goes each direction. With half of the water, the ______is ______of the original stream. This is like electrons moving in a ______ circuit.
Resistance (R) is a measure of the ______to the flow of electrons
Resistance is measured in ______(Ώ).
Ø When there is ______in a wire, or some other load, the electrons can not ______the wire easily due to ______and the electrical energy is changed into heat energy.
Resistance can increase due to
· Increase in ______of wire
· Decrease in ______of wire
Ohm’s Law states that ______, ______, and ______are all related
Volts = Current x Resistance
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Find the Resistance of the loads in the following circuits:
a. b.
Find the voltage of the load in the following circuits:
b. d.
Find the current for the loads in the following circuits:
e. f.