124-03 DC Circuits

124-03 DC Circuits - PHYSICS 122 EXPERIMENT No. 3 PHYSICS...

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PHYSICS 122 EXPERIMENT No. 3 PHYSICS 124 EXPERIMENT NO. 3 DC CIRCUITS The purpose of this laboratory is to observe the relation the relationship between voltage drop across, and current through, electrical circuit component, You will also gain familiarity with connecting circuit up and with voltmeter and ammeters Discussion Ohmic components obey Ohm's law of V = JR, where - V is the potential difference, I is the current, and R is a constant (the resistance). Standard circuit resistors are ohmic. In general, however, R may depend on factors such as the temperature (e.g., light bulbs), the direction of current flow (diodes), or light intensity falling on the component (light sensitive diodes). You will use a voltmeter to measure V, the voltage drop across the component, and an ammeter to measure I, the current flow through the component. You must keep in mind that ammeters must be connected in series in circuits, while voltmeters must be connected in parallel across the circuit component whose
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124-03 DC Circuits - PHYSICS 122 EXPERIMENT No. 3 PHYSICS...

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