Measurements in Electric Circuits ELECTRICITY

Learning Goals To be able to describe the different types of electrical measurements

There are 3 variables that can be measured in an electric circuit Electric Current – the rate of flow of electrons past a certain point in a circuit Potential Difference (Voltage) – the difference in electric potential energy per unit of charge Resistance – the ability of a material to oppose the flow of electrons through it

Symbol for circuit diagrams   Current Potential Difference Resistance Symbol I V R Unit Ampere (A) Volt (V) Ohms (Ω) Device Ammeter Voltmeter Ohmmeter Symbol for circuit diagrams How is it connected Series Parallel

Factors that Affect Resistance Type of Material Copper has low resistance, while nichrome (in a toaster) has high resistance Length The longer the wire, the higher the resistance Thickness The thicker the wire, the less resistance Temperature As temperature increases, the resistance usually increases

Multimeter A single device that allows you to measure current, voltage, and resistance by changing settings

Success Criteria I CAN describe amperes, volts and ohms I CAN explain the factors that affect resistance