Could someone please confirm that I approached particularly part B in the right way to find the right answer..
problem:
http://img366.imageshack.us/img366/9329/22112211.jpg
answer:
http://img366.imageshack.us/img366/427/778899.jpg
As a side question, power for the MOSFET is P = V^2/Reff but if the Vs isn't connected to ground, i.e. if the circuit is not complete, then no current flows. In the above equation for power, the current i is not in the equation, yet it is still taken into account? In other words, it's implied that if no current flows no power is consumed?
problem:
http://img366.imageshack.us/img366/9329/22112211.jpg
answer:
http://img366.imageshack.us/img366/427/778899.jpg
As a side question, power for the MOSFET is P = V^2/Reff but if the Vs isn't connected to ground, i.e. if the circuit is not complete, then no current flows. In the above equation for power, the current i is not in the equation, yet it is still taken into account? In other words, it's implied that if no current flows no power is consumed?