Problem ID: 84
Problem Filename: thev_box_ex2
Keywords:
Circut Description:
- Black Box
- Variable Resistor
Analysis Method:
- Thèvenin Equivalents
- KVL
Math Method:
- Algebra
Thèvenin Equivalents
Black Box Terminal Behavior
Problem #2
When the variable load resistance Rl is 1 kΩ the measured voltage Vm is 30 volts. When Rt is lowered to 10Ω the voltage drops to 3 volts. What would you expect Vm to be when the load resistance is removed?
Need a hint?
Model the mystery circuit as a Thèvenin equivalent. Use both cases to develop two equations for Rt and Vt. Vm can be found easily from those.