1. Disconnect the previous circuit. On your circuit board, connect your three resistors R, R2 and R3 in parallel, as shown in Fig. 1(b). Do not connect the battery yet! 2. Use one of your multimeters in the ohmmeter mode to measure the resistance of the parallel combination of R,, R2 and R3. Record this as the measured equivalent resistance in Table C on your data sheet. 3. Calculate the theoretical equivalent resistance Reg of this parallel combination of R1, R2 and R3. On separate paper, show your work in calculating this equivalent resistance. Record your theoretical value of Reg in Table C on your data sheet. (See the Theory section for a discussion of how to calculate Reg-) 4. Now use this parallel combination of R,, R2 and R, to construct the parallel circuit shown in Figure 9, with the ammeter in series with the batteries so that it measures the total current / (the current through the batteries). Dov R,= a5 R, = 50n Ra=

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How do I solve Table C?
45
Experiment 4: Resistors in Series and Parallel
Section C: The Parallel Circuit
Table C Parallel
Theoretical Value
Measured Value
% Error
Equiv. Resistance
Reg (2)
N/A
measured
Source Voltage
Vs(V)
2ov
Total Current:
I(A)
Current Through
R1: 14 (A)
0.50
Current Through
R2: I2(A)
0,40
Current Through
R3: 13(A)
0.27
= , + 12 + I3
Current check
I = I, + I2 + I3
l47
|Theoretical - Measured|
percent error =
X 100
Theoretical
Attach Calculations
Transcribed Image Text:45 Experiment 4: Resistors in Series and Parallel Section C: The Parallel Circuit Table C Parallel Theoretical Value Measured Value % Error Equiv. Resistance Reg (2) N/A measured Source Voltage Vs(V) 2ov Total Current: I(A) Current Through R1: 14 (A) 0.50 Current Through R2: I2(A) 0,40 Current Through R3: 13(A) 0.27 = , + 12 + I3 Current check I = I, + I2 + I3 l47 |Theoretical - Measured| percent error = X 100 Theoretical Attach Calculations
Experiment 4 Resstors in Series and Parallel
Experiment 4: Resistors in Series and Parallel
Iculate the theoretical total current I and voltages V,, V, and V.. Record these in Table
Calcu
B on your data sheet. Use the source voltage you measured along with the theoretical
values of the resistances from Table A. Show your work on separate paper! (See the
Theory section, if necessary, for a discussion of the proper way to carry out these
calculations.)
circuits looks like that shown in Figure 10. (You may need to rearrange some of your
connections.)
R-2s Ka-50-ル
7. Calculate the percent errors between your theoretical predictions and your measured
results and record these in Table B on your data sheet.
dou Vs =
Ra
8. According to Kirchhoff's voltage rule, the sum of the voltages V, + V2 + V3 should equal
the source voltage Vs. Compute and record the sum V, + V2 + V3. Compare this to the
theoretical value Vs (that you measured) by computing a percent error.
Figure 10. Current through R1
8. Once you have recorded 4, reconnect R, as it was originally connected and move the
ammeter to measure l2 and lz respectively. Record these in Table C. When you are
done, disconnect one of the leads to the battery so you do not drain the battery while you
are doing the following calculations.
Section C: The Parallel Circuit
1. Disconnect the previous circuit. On your circuit board, connect your three resistors R1,
R2 and R3 in parallel, as shown in Fig. 1(b). Do not connect the battery yet!
9. Calculate the theoretical currents I, 1,, 12 and lz. Record these in Table C on your data
sheet. Use the source voltage you just measured along with the theoretical values of the
resistances from Table A to make your calculations. Show your work on separate
paper! (See the Theory section for a discussion of the proper way to carry out these
calculations.)
2. Use one of your multimeters in the ohmmeter mode to measure the resistance of the
parallel combination of R,, R, and R3. Record this as the measured equivalent resistance
in Table C on your data sheet.
3. Calculate the theoretical equivalent resistance Reg of this parallel combination of R1, R2
and R3. On separate paper, show your work in calculating this equivalent resistance.
Record your theoretical value of Reg in Table C on your data sheet. (See the Theory
section for a discussion of how to calculate Rea-)
10. Calculate the percent errors between your theoretical predictions and your measured
results and record these in Table C on your data sheet.
4. Now use this parallel combination of R1, R2 and R3 to construct the parallel circuit
shown in Figure 9, with the ammeter in series with the batteries so that it measures the
total current / (the current through the batteries). Jov R, = a5 R2 =50n Ra=75n
11. According to Kirchhoff's current rule, this sum of the currents l + 12 + l3 should equal
the total current I supplied by the battery. Calculate the sum of the measured currents
I, +12 +13 and record this sum in Table C. Calculate and record the percent error
between the sum of your measured currents and your measured total current I.
Section D: The Series-Parallel Circuit
1. Disconnect the previous circuit. On your circuit board, connect R2 and R3 in parallel,
then connect this parallel combination of R2 and Rg in series with R, as shown in
Figure 1(c). Do not connect the battery yet!
Jor. Vs
2. Use one of your multimeters in the ohmmeter mode to measure the resistance of the
series-parallel combination of R1, R2 and Rg. Record this measured equivalent resistance
in Table D on your data sheet.
R2
R3
3. Calculate the theoretical equivalent resistance Reg of this series-parallel arrangement of
R1, R2 and R3. On separate paper, show your work in calculating this equivalent
resistance. Record your theoretical value of Reg in Table D on your data sheet. (See the
Theory section for a discussion of how to calculate Reg)
Figure 9. Parallel circuit setup
5. With the second multimeter set in the voltage setting, measure and record the source
voltage on table C.
4. Now use this combination of R1, R2 and R3 to construct the series-parallel circuit shown
in Figure 11, with the ammeter in series with the two batteries and R. Measure and
record the current /, as the measured value in Table D.
6. Record the total current, I, as your measured value on table C
7. In order to measure the currents I, 12, and I3 you will need to move the ammeter. First
disconnect the ammeter and replace it with a wire so that you have a complete circuit
again. Now disconnect one side of R, and insert the ammeter into the circuit so that your
Transcribed Image Text:Experiment 4 Resstors in Series and Parallel Experiment 4: Resistors in Series and Parallel Iculate the theoretical total current I and voltages V,, V, and V.. Record these in Table Calcu B on your data sheet. Use the source voltage you measured along with the theoretical values of the resistances from Table A. Show your work on separate paper! (See the Theory section, if necessary, for a discussion of the proper way to carry out these calculations.) circuits looks like that shown in Figure 10. (You may need to rearrange some of your connections.) R-2s Ka-50-ル 7. Calculate the percent errors between your theoretical predictions and your measured results and record these in Table B on your data sheet. dou Vs = Ra 8. According to Kirchhoff's voltage rule, the sum of the voltages V, + V2 + V3 should equal the source voltage Vs. Compute and record the sum V, + V2 + V3. Compare this to the theoretical value Vs (that you measured) by computing a percent error. Figure 10. Current through R1 8. Once you have recorded 4, reconnect R, as it was originally connected and move the ammeter to measure l2 and lz respectively. Record these in Table C. When you are done, disconnect one of the leads to the battery so you do not drain the battery while you are doing the following calculations. Section C: The Parallel Circuit 1. Disconnect the previous circuit. On your circuit board, connect your three resistors R1, R2 and R3 in parallel, as shown in Fig. 1(b). Do not connect the battery yet! 9. Calculate the theoretical currents I, 1,, 12 and lz. Record these in Table C on your data sheet. Use the source voltage you just measured along with the theoretical values of the resistances from Table A to make your calculations. Show your work on separate paper! (See the Theory section for a discussion of the proper way to carry out these calculations.) 2. Use one of your multimeters in the ohmmeter mode to measure the resistance of the parallel combination of R,, R, and R3. Record this as the measured equivalent resistance in Table C on your data sheet. 3. Calculate the theoretical equivalent resistance Reg of this parallel combination of R1, R2 and R3. On separate paper, show your work in calculating this equivalent resistance. Record your theoretical value of Reg in Table C on your data sheet. (See the Theory section for a discussion of how to calculate Rea-) 10. Calculate the percent errors between your theoretical predictions and your measured results and record these in Table C on your data sheet. 4. Now use this parallel combination of R1, R2 and R3 to construct the parallel circuit shown in Figure 9, with the ammeter in series with the batteries so that it measures the total current / (the current through the batteries). Jov R, = a5 R2 =50n Ra=75n 11. According to Kirchhoff's current rule, this sum of the currents l + 12 + l3 should equal the total current I supplied by the battery. Calculate the sum of the measured currents I, +12 +13 and record this sum in Table C. Calculate and record the percent error between the sum of your measured currents and your measured total current I. Section D: The Series-Parallel Circuit 1. Disconnect the previous circuit. On your circuit board, connect R2 and R3 in parallel, then connect this parallel combination of R2 and Rg in series with R, as shown in Figure 1(c). Do not connect the battery yet! Jor. Vs 2. Use one of your multimeters in the ohmmeter mode to measure the resistance of the series-parallel combination of R1, R2 and Rg. Record this measured equivalent resistance in Table D on your data sheet. R2 R3 3. Calculate the theoretical equivalent resistance Reg of this series-parallel arrangement of R1, R2 and R3. On separate paper, show your work in calculating this equivalent resistance. Record your theoretical value of Reg in Table D on your data sheet. (See the Theory section for a discussion of how to calculate Reg) Figure 9. Parallel circuit setup 5. With the second multimeter set in the voltage setting, measure and record the source voltage on table C. 4. Now use this combination of R1, R2 and R3 to construct the series-parallel circuit shown in Figure 11, with the ammeter in series with the two batteries and R. Measure and record the current /, as the measured value in Table D. 6. Record the total current, I, as your measured value on table C 7. In order to measure the currents I, 12, and I3 you will need to move the ammeter. First disconnect the ammeter and replace it with a wire so that you have a complete circuit again. Now disconnect one side of R, and insert the ammeter into the circuit so that your
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