0-10mAdc mA IK 1K 0-3ovde 1.5K R, 10K Fig. 9-2 c) Turn on the power source and adjust to 30Vdc. d) Adjust resistor R, until the milliam- meter indicates a current flow of 2.5mAdc. e) Use Ohm's Law to calculate the voltages ER, ER, and Eg across resistors R,.R2 and R3. Vdc ER, ERs Vdc Egs Vde %3D 9-3

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b) Add the measured voltages E, ER.
Vde
Eg, and Eg, together. Does this sum equal the
source voltage?
mada
CALCULATED
MEASURED
c) If you added the four voltage drops, then
subtracted the sum from the source voltage, would
the result be zero?
Table 9-1
4. a) Disconnect resistor R. from the circuit.
b) Connect the 10K2 potentiometer, resis-
b) Measure the current flowing in the cir
tor Rs, with a jumper wire connecting terminals 2
and 3 into the circuit in place of resistor Ra as
shown in Fig. 9-2.
cuit,
mAde
NOTE: Resistor R; is a potentiometer wired as a
rheostat. Rheostats and potentiometers will be in-
vestigated in Laboratory Experiment No. 14. Dur-
ing this Procedure it is only necessary that you
know you can vary the ohmic value of resistor R;
between zero and 10,000 ohms.
c)Use the Electronic VOM and measure
the voltage drops across resistors R1, R2, R3 and
R4.
d) Enter the measured current and voltages
in Table 9-1.
e) Compare your calculated and measured
0-10mAdc
mA
circuit values.
1K
Are they the same?
1K
What factors could cause them to be different?
0-30vde
1.5K
R, 10K
Fig. 9-2
f) Return the voltage to zero and turn off
the power source.
c) Turn on the power source and adjust to
3. a), Use the measured current and voltage
values to calculate the actual value of each of the
30Vde.
d) Adjust resistor Rs until the milliam-
resistors.
meter indicates a current flow of 2.5mAdc.
e) Use Ohm's Law to calculate the voltages
R, =
ER, ER, and Eg, across resistors R,, R2 and R3
R =
ER,
Vdc
Vdc
R4 =
Egs
Vde
SERIES CIRCUITS - KIRCHHOFF'S LAW
9-3
Transcribed Image Text:b) Add the measured voltages E, ER. Vde Eg, and Eg, together. Does this sum equal the source voltage? mada CALCULATED MEASURED c) If you added the four voltage drops, then subtracted the sum from the source voltage, would the result be zero? Table 9-1 4. a) Disconnect resistor R. from the circuit. b) Connect the 10K2 potentiometer, resis- b) Measure the current flowing in the cir tor Rs, with a jumper wire connecting terminals 2 and 3 into the circuit in place of resistor Ra as shown in Fig. 9-2. cuit, mAde NOTE: Resistor R; is a potentiometer wired as a rheostat. Rheostats and potentiometers will be in- vestigated in Laboratory Experiment No. 14. Dur- ing this Procedure it is only necessary that you know you can vary the ohmic value of resistor R; between zero and 10,000 ohms. c)Use the Electronic VOM and measure the voltage drops across resistors R1, R2, R3 and R4. d) Enter the measured current and voltages in Table 9-1. e) Compare your calculated and measured 0-10mAdc mA circuit values. 1K Are they the same? 1K What factors could cause them to be different? 0-30vde 1.5K R, 10K Fig. 9-2 f) Return the voltage to zero and turn off the power source. c) Turn on the power source and adjust to 3. a), Use the measured current and voltage values to calculate the actual value of each of the 30Vde. d) Adjust resistor Rs until the milliam- resistors. meter indicates a current flow of 2.5mAdc. e) Use Ohm's Law to calculate the voltages R, = ER, ER, and Eg, across resistors R,, R2 and R3 R = ER, Vdc Vdc R4 = Egs Vde SERIES CIRCUITS - KIRCHHOFF'S LAW 9-3
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