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Measurements in Electric Circuits

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Presentation on theme: "Measurements in Electric Circuits"— Presentation transcript:

1 Measurements in Electric Circuits
ELECTRICITY

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

3 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

4 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

5 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

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

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


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