Answer Happy

I am having trouble with B4, with a single value of V should Ibe able to measure the resistance or no because the pencils are inseries and not in parallel?
And in B2, it heats up just because there is resistance in thecircuit?
B. Ohm's Law and Measuring Resistance Note: The DMM/power supply configuration used in this section may assist you with Part C DMM 1 +15 15.00 mA E 0 148-1 ado ação ++++++ ++++++ ++ + +++ +++ 14.9 7 V DMM ₂ Voltage must be measured in parallel with the circuit element, current must be measured in series, as in the diagram/picture. See instructions in B1.
B1. Configure your two DMM's and power supply to supply power and measure current and voltage. Current must be measured in series with the power supply, since current is equal in series. Voltage must be measured in parallel, since the voltage is equal in parallel. One way to accomplish the setup is shown below. LAMAN A black wire goes from the power supply to the Ammeter. A second Black wire goes from the Ammeter to the contact point. A red wire acts as a second contact point and goes back to the power supply. The Voltmeter's red and black wires connect to the contact points. B2. Turn on the power supply and connect the contact points to the double sided pencil. Current will run through it! You may even be able to feel it warm up (why?). B3. Choose 4-5 voltages ranging between OV and 15V and record the current and voltages given by the DMMs. In excel plot Voltage vs. Current, and determine the resistance from this plot. B4. Place a second pencil end to end with the first, and measure the resistance using V/I for a single value of V. Is this what you expect?