The circuit shown ensures a constant current of 100 mA is delivered to the load even if the load conditions are changing. The Zener breakdown voltage is 5 V. Determine the value of R needed. Assume...

The circuit shown ensures a constant current of 100 mA is delivered to the load even if the load conditions are changing. The Zener breakdown voltage is 5 V. Determine the value of R needed. Assume the transistor is Silicon and that V⁺ is large enough to cause the Zener to go into breakdown and to prevent the transistor from going into saturation. Assume further that the collector and emitter currents are approximately equal.