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Measuring Electricity

Learn about measuring electricity through current, voltage, and resistance in circuits. Discover the role of amperes, volts, and Ohms in electrical systems with practical tools like voltmeters, ammeters, and multimeters.

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Measuring Electricity

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  1. Measuring Electricity

  2. You measure...

  3. How do we measure Electricity?

  4. Current (I) • The number of electrons passing a point in a circuit every second • Connected in series to a circuit • Measured in amperes or amps (A)

  5. Electric Potential (V) • Also known as Voltage • The force that moves or pushes electrons through a circuit • Connected in parallel to a circuit. • Measured in volts (V)

  6. Resistance (R) • Resists or reduces the current in a circuit • Converts electrical energy into other forms of energy (heat, light, motion, sound) • Measured in Ohms (Ω)

  7. Resistance (R) • Ohm’s Law states that the larger the resistance, the smaller the current • R = V/I

  8. Measuring Voltage and Current Voltmeter Ammeter • Measures the voltage drop in a circuit in volts (V) • Measures the amount of electric current flowing past a point in a circuit in amps (A)

  9. Measuring Voltage and Current Voltmeter Ammeter • Connected to a circuit in parallel between two points • Connected to a circuit in series

  10. Multimeter • Can be used to measure current, voltage or resistance • When the meter is set to read current, it must be connected in series • When the meter is set to read potential difference, it must be connect in parallel with the load

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