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**LE LEGGI DI OHM Misurare V, i ed R Esercizi su Resistenze in serie e in parallelo**

Lezione tratta dal sito Del Massachussets Institute of Tecnology Dal corso di Fisica 2

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**Classe 5^ C LST I.T.T. “Tito Sarrocchi” Siena a.s. 2011-2012**

Hour 1: Working with Circuits Expt. 4. Part I: Measuring V, I, R

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Last Time: Resistors & Ohm’s Law

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Last time

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**Measuring Voltage & Current**

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**Measuring Potential Difference**

A voltmeter must be hooked in parallel across the element you want to measure the potential difference across Voltmeters have a very large resistance, so that they don’t affect the circuit too much

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Measuring Current A ammeter must be hooked in series with the element you want to measure the current through Ammeters have a very low resistance, so that they don’t affect the circuit too much

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Measuring Resistance An Ohmmeter must be hooked in parallel across the element you want to measure the resistance of Ohmmeters apply a voltage and measure the current that flows. They typically don’t work if the resistor is powered (connected to a battery)

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EXERCISES

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Exercise 1

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Exercise 2

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Exercise 3

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Exercise 4

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Exercise 5

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