This week’s lab we went over a few concepts that deal with resistance, voltage, and current of a circuit that is in series or in parallel.
If components in a circuit are …
Total Resistance = the sum of the resistors from all parts of the circuit
R = r1 + r2 + r3
Current = constant through out the circuit
I = i1 = i2 = i3
Voltage = the sum of all voltage from all parts of the circuit
V = v1 + v2 + v3
In the image below we have two LEDs in series with a resistor. This means that the total resistance in this circuit is equal to the resistance from the resistor, LED1 and LED 2. Likewise the total voltage is also divided amongst its components, so it is equal to the voltage from the resistor and the two LEDs. The current remains the same with each component.
Total Resistance = constant throughout the circuit
R = 1/r1 =1/r2 = 1/r3
Current = the sum of the current from all parts of the circuit
I = i1 + i2 + i3
Voltage = constant throughout the circuit
V = v1 + v2 = v3
The components in the picture below are in parallel circuits. This means that the voltage remains the same with each component, while the total current is equal to the sum of the current from each component.