Mathcad Community Challenge March 2023 - Electrical Engineering

This month’s challenge is electrical engineering related, but with multiple voltage potential sources in addition to resistors. See the image below.

Scenario 1. We have a circuit with a motor (modeled as a 100 Ohm resistor), a 6V voltage source, and a 100 Ohm resistor. Calculate the current in the motor and the resistor.

Scenario 2. We add another loop, with an additional 8V voltage source and a 120 Ohm resistor. Calculate the current in the motor and the two resistors.

Scenario 3. We add another loop, with an additional 10V voltage source and a 140 Ohm resistor. Calculate the current in the motor and the three resistors.

Scenario 4. We add another loop, with an additional 12V voltage source and a 160 Ohm resistor. Calculate the current in the motor and the four resistors.

Note that these situations cannot be reduced to a combination of series or parallel resistors. There is a principle called Superposition you can apply instead.

I’m looking forward to seeing what Mathcad techniques can be applied to this problem!

Please refer to the PTC Mathcad Community Challenge Index and Guidelines for a list of rules for these challenges, as well as a listing of the previous challenges.