Hi all,

Im having a bit of trouble answering two questions on a past paer.

Q1) What are the three principle features of an ideal operational amplifier or op-amp??

Q2) Draw the power triangle relating active power, P, reactive power, Q, apperent power, S and the power factor angle.

Any ideas on how to answer the questions, been looking through all my notes and can't seem to find anything.

Thanks, Ammo

 

Q1) What are the three principle features of an ideal operational amplifier or op-amp??

Infintie open loop gain, infinite input resistance, and zero output resistance.

Q2) Draw the power triangle relating active power, P, reactive power, Q, apperent power, S and the power factor angle.

Look here: http://www.allaboutcircuits.com/vol_2/chpt_11/2.html

 

Thanks, you've been very helpfull