6 Current Current is the rate at which charges flow through a circuit 1 coulomb in 1 sec = 1 Ampere (Amp)
7 Direction of the Current flow CONVENTIONAL CURRENTDirection positive charges would moveAway from higher potential (+ on the battery)ELECTRON CURRENTDirection electrons would moveAway from lower potential (- on the battery)
12 Voltage in a circuitWhen voltage sources are connected in series and in the same direction, their voltages add together.If they’re in opposite directions you subtract their voltages (it’s like they’re working against each other)
13 Resistance in a circuit In a series circuit, you add each of the individual resistances
14 In a parallel circuit, it’s a little more complex.
15 Chanting Ohmmmmm on the AP exam has not been proven to be effective. Current in a circuitThe amount of current flowing through a given part of a circuit is determined from the resistance and the voltage using ohm’s lawChanting Ohmmmmm on the AP exam has not been proven to be effective.
16 Ohm’s Law V = IR V is voltage (volts – V) I is current (amperes or amps – A)R is resistance ( ohms - Ω)
17 Determining Voltage, Resistance, and Current in a circuit
18 That’s great if you have a purely series or parallel circuit but what if there’s a combination of the two, some kind of, I don’t know, “combination circuit”?
26 Power The power dissipated in a circuit element equals: P=IV The total power dissipated by the elements in a circuit must equal the power supplied by the batteryBasically you have to use all the power and you can’t use more power than you’re given