Procedure Known Resistance 1. The circuit should already be assembled with the known resistor. Record its value in Table 1. 2. Adjust the power supply to the voltages specified by your lab instructor. Record the voltages and corresponding currents. Note: If your power supply has multiple set voltages you may use these valnes in lieu of the DMM. However, the current will still need to be measured - and will be in milliamperes (mA). 3. When finished, turn the voltage back to minimum and turn off the power supply. Turn off the DMM(s). 4. Plot a graph of Voltage vs. Current. Draw the straight line of best fit through the points and determine the slope of the line. Vol tage (Y-axis), , vO lts Currewt (X-axis) 4 MA Unknown Resistance 1. Replace the known resistor in the circuit with the unknown resistor. 2. Repeat the previous procedure, using Table 2 and the second sheet of graph paper. Data Page Known resistance (2) 500 Voltage (V) Current (mA) 6.0 12-1 3.0 6.0 9.0 12.6 15.0 26.0 25.0 30.0 Questiona: The Unit of Resistance is an ohm (S),whichis a VIA. The slope of your line is V/mA; multiply it by 1000 to get the resis tance in ňlohm). O what is the percent error Table 1: Known Resistor Data Voltage (V) Current (mA) 11,0 3.0 6.0 20.0 24.0 40.0 49.0 9.0 12.0 between thiS value and the resistance you recorded in Table 1.? 15.0 Table 2: Unknown Resistor Data 2) what is the resistance & the unknown resistor (Graph 2)?
Procedure Known Resistance 1. The circuit should already be assembled with the known resistor. Record its value in Table 1. 2. Adjust the power supply to the voltages specified by your lab instructor. Record the voltages and corresponding currents. Note: If your power supply has multiple set voltages you may use these valnes in lieu of the DMM. However, the current will still need to be measured - and will be in milliamperes (mA). 3. When finished, turn the voltage back to minimum and turn off the power supply. Turn off the DMM(s). 4. Plot a graph of Voltage vs. Current. Draw the straight line of best fit through the points and determine the slope of the line. Vol tage (Y-axis), , vO lts Currewt (X-axis) 4 MA Unknown Resistance 1. Replace the known resistor in the circuit with the unknown resistor. 2. Repeat the previous procedure, using Table 2 and the second sheet of graph paper. Data Page Known resistance (2) 500 Voltage (V) Current (mA) 6.0 12-1 3.0 6.0 9.0 12.6 15.0 26.0 25.0 30.0 Questiona: The Unit of Resistance is an ohm (S),whichis a VIA. The slope of your line is V/mA; multiply it by 1000 to get the resis tance in ňlohm). O what is the percent error Table 1: Known Resistor Data Voltage (V) Current (mA) 11,0 3.0 6.0 20.0 24.0 40.0 49.0 9.0 12.0 between thiS value and the resistance you recorded in Table 1.? 15.0 Table 2: Unknown Resistor Data 2) what is the resistance & the unknown resistor (Graph 2)?
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Please help with the below project. I have worked through the experiment but would appreciate additional understanding. Please help with entire experiment. My main focus is finding the slopes, percent error and resistance for table 1 and unknown resistor for table 2. Thank you.
Transcribed Image Text:Ohm's Law
Objective
In this experiment you will verify the relationship between voltage and current given in Ohm's law.
Apparatus
Power supply, Resistors, Patch cords, DMM.
Background
Ohm's law
V = IR
states the relationship between the potetial (voltage) V applied to a conductor and the current I through
it. This is another direct proportion; if you double the voltage the current doubles, triple the voltage the
current triples, etc.
Theoretically, a graph produces a straight line through the origin with a slope equal to the resistance R of
the conductor: With voltage in volts (V) and current in amperes (A), resistance is in ohms (2, which is a
V/A).
The experimental circuit is shown below.
V
A power supply V is used to vary the voltage across a resistor R. A digital multimeter (DMM) measure
the current I through the resistor. The slope of the line on the resulting Voltage vs. Current graph is the
resistance of the resistor.
Transcribed Image Text:Procedure
Known Resistance
1. The circuit should already be assembled with the known resistor. Record its value in Table 1.
2. Adjust the power supply to the voltages specified by your lab instructor. Record the voltages and
corresponding currents. Note: If your power supply has multiple set voltages you may use these valnes
in lieu of the DMM. However, the current will still need to be measured - and will be in milliamperes
(mA).
3. When finished, turn the voltage back to minimum and turn off the power supply. Turn off the DMM(s).
Đ 4. Plot a graph of Voltage vs. Current. Draw the straight line of best fit through the points and determine
the slope of the line.
Vol tage (y-axis),
, vO lts
Currewt (X-axis)
4 MA
Unknown Resistance
1. Replace the known resistor in the circuit with the unknown resistor.
2. Repeat the previous procedure, using Table 2 and the second sheet of graph paper.
Data Page
Known resistance (2) 500
Voltage
(V)
Current
(mA)
6.0
12.1
3.0
6.0
9.0
12.0
15.0
26.0
25.0
30.0
Questiona :
*The Unit of Resistunce
is an ohm (S),whichis
a VIA, The slope of your
line is V/mA; multiply
it by 1000 to get the
resis tance in ňlohm).
O What is the percent error
Table 1: Known Resistor Data
Voltage
(V)
Current
(mA)
11,0
3.0
6.0
20.0
24.0
40.0
49.0
9.0
between thiS value and the
resistance you recorded
in Table 1.?.
12.0
15.0
Table 2: Unknown Resistor Data
2) what is the resistance
& the unknown
resistur (Graph 2)?
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