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Measuring Voltage Lab

Measuring Voltage Lab. In today’s lab, you will be measuring the voltage produced by different sources. Remember , voltage is the measure of the ability to pump electrons and cause a constant current flow. In the past, Physicists used a Voltmeter to measure the amount of voltage produced.

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Measuring Voltage Lab

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  1. Measuring Voltage Lab In today’s lab, you will be measuring the voltage produced by different sources. Remember, voltage is the measure of the ability to pump electrons and cause a constant current flow. In the past, Physicists used a Voltmeter to measure the amount of voltage produced. They used an Ammeter to measure current and an Ohmmeter to measure resistance.

  2. Today, you will use a Multimeter. It is a 3-in-1 instrument. It will look similar to this: • Set the dial to the voltmeter range setting • indicated by the symbol: • V • (this is for measuring a constant voltage) • In this range, set the dial to 20 • (this means that you can measure voltages from 0 to 20 Volts.)

  3. Use the Multimeter to measure the voltages of several different batteries. • Record the measure voltages for these batteries and compare them to their published voltage. • Record the voltage of a single bulb.

  4. A “natural battery” • Today, you are going to make a battery out of a lemon. • You will: • insert various metal tabs into the lemon. • These tabs are called electrodes. • use the lemon juice as an electrolyte. • An electrolyte is a solution that is electrically conductive. • use the probes from the multimeter to complete a circuit between • the electrodes. • record voltage produced by your lemon.

  5. A “natural battery” • Insert various metal electrodes into slits placed in a lemon • Using a multimeter, record the voltages produced by different combinations of metals. • Using the combination of metal electrodes which produce the most voltage, hook up 2 lemon batteries and measure the combined voltage.

  6. The process of generating an electrical voltage is called an Oxidation /Reduction process. At one electrode, oxidation means that the electrode will disintegrate and lose electrons. It’s called the Anode or negative terminal. At the other electrode, reduction means that the electrode will take and use the electrons. It’s called the Cathode or positive terminal. Oxidation Involves Loss (of electrons) Reduction Involves Gain (of electrons)

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