# Question Lab

• Consider the circuit demonstrated in this week’s presentations. With the turns ratio modified to 20:1, calculate the following values of Vs and Is for the given values of RL in the table below:

 RL Calculated Vs Calculated Is Measured Vs Measured Is 0 Ω 10 Ω 25 Ω 50 Ω 100 Ω 1000 Ω

• Construct the transformer circuit in MultiSIM and complete the table in part 2 with the measured values of Vs and Is for each value of RL. Use the Agilent Digital Multi-meter to take the measurements and capture a screen shot of each measurement.

• Discuss the following:

• Describe the relationship of RL on the secondary voltage.

• Describe the relationship of RL on the secondary current.

• How do the calculated values compare to the measured values?

• How would you go about calculating the transformer power efficiency?

• How would you go about measuring the transformer power efficiency?

• Determine the transformer power efficiency for the circuit in MultiSIM. Include a calculation and a measured value.