EE215_Lab1

# Procedure 2 ohms law 15 points set up construct the

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Unformatted text preview: ce did you measure between unconnected holes? What did your multimeter read? 1. c (1 point) • Does it make a difference which probe goes in which hole? Some hints on measuring current: A multimeter set to measure current is an ammeter (amp ­meter). You have to connect the ammeter into the circuit, as though it was a piece of wire, so the current you want to measure flows through it, as shown in Figure P2 ­2. The ammeter looks like a short circuit from the circuit's point of view. Sometimes you have to move the meter leads to different holes on the meter. As soon as you are done measuring current, it is good practice to switch the multimeter back to off, or back to measuring voltage. If you inadvertently try to measure voltage with a multimeter set to current, you will short your circuit, which is not healthy for the circuit or the multimeter. The circuit may burn out components, identifiable by charring, bad smells, cracking and general failure to work. The multimeter may blow a fuse, which can be difficult to find and replace, or just burn out. On the voltage setting, the multimeter looks like an open circuit, and probing the circuit with it is safer. Procedure 2 Ohm's Law (15 points) Set up • Construct the circuit in Figure P2 ­1 on your breadboard with RM being the mystery resistor. See below for construction hints. Measurements and Questions: 2. a (2 points) • Draw the circuit schematic diagram for the circuit in Figure P2 ­1 using standard symbols for resistor and battery. 2. b (1 points) • Measure the voltage v across RM. Record the value. 2. c (1 point) • Measure the current i using your multimete...
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