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Build the circuit shown... 
Circuit diagram simple circuit. |
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Simple circuit. (Enlarge) |
As soon as you connect the battery, the resistor heats up slightly. At the resistor a voltage is applied and a resulting current flows through the resistor. The electric energy turns into heat. You now have indirectly concluded that a voltage is applied and a current flows. But how big is the voltage and current? In order to find out you need a voltmeter and an ammeter... |
