User manual

11
Once you have both your voltage and resistance measurements, you can then calculate power using the formula below:
 



where P represents power, V represents the measured voltage, and R is the measured resistance. Table 2.1 lists your
results based on the circuit in Figure 2.3.
Average Power
Measured Resistance
Measured Voltage
Voltage Source
141 mW
176.85 Ω
5 Vdc
5 Vdc (DC)
17.7 mW
rms
176.85 Ω
1.768 Vrms
5 Vpp at 60 Hz (AC)
Table 2.1. Multisim Circuit Simulation Results
2.2 Component Demonstration
Follow these steps to calculate the power measurements of a resistor network using the VirtualBench DMM and FGEN.
Parts List
● One BNC-to-alligator cable
● Two DMM probes
● One breadboard
● Eight 47 Ω 5 percent tolerance resistors
● Three 1 kΩ 5 percent tolerance resistors
Build the resistor network: Refer to the schematic diagram and example breadboard layout shown in figures 2.4 and
2.5. The resistor network requires the following connections to VirtualBench:
1. R1 -> FGEN positive lead (red/gray wire in Figure 2.5)
2. R1 -> DMM positive probe (dark red wire in Figure 2.5)
3. R11 -> FGEN negative lead (black/gray wire in Figure 2.5)
4. R8 -> DMM negative probe (black wire in Figure 2.5)