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VoltageVoltage is the force that makes a current flow if there is a complete circuit. In the same way, water pressure will make the water flow (if the tap is open). Voltage, EMF, Potential and Potential Difference are all broadly the same thing but with precise meanings explained here ... PotentialThis is a measurement of Voltage (EMF) relative to Ground or Earth. Potential DifferencePotential Difference is a measurement of the difference between two potentials (relative to each other and not to Ground or Earth). The VoltThe volt is defined as the potential difference across a conductor when a current of one ampere dissipates one watt of power. Electromotive ForceAn electromotive force is the force that tends to make charge move or flow in a circuit. EMF is measured in volts. |
TASK
Build this circuit and measure V1, V2 and V3. Also measure the current flowing.
Calculate the resistance of each resistor using Ohm's law.
Do your answers match the labeled resistor values?
If not, why not?
How accurately are the resistors manufactured?
How accurate is your multimeter?
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