The current for a dc machine is controlled using a proportional control. Based on the machine parameters given below, what is the required proportional gain for a steady state error of 2 %?

Ra = 0.8 1 Armature resistance
Kpwm = 10 PWM gain

A. 23.4 Ohm
B. 3.92 Ohm
C. 3.23 Ohm
D. 2.50 Ohm'

Aflywheel accelerates for 5 seconds at 2 rad/s2 from a speed of 20 rpm. determine the total number of revolutions of the flywheel during the period of its acceleration. a.5.65 b.8.43 c. 723 d.6.86

An ideal otto cycle with air as the working fluid has a compression ratio of 8. the minimum and maximum temperatures in the cycle are 300 k and 1340 k. use constant specific heats at room temperature to determine (a) the amount of heat transferred to the air during the heat- addition kj/kg, (b) the thermal efficiency, and (c) the thermal efficiency of a carnot cycle ope limits. process, in rating between the same temperature

Which of the following components of a pid controlled accumulates the error over time and responds to system error after the error has been accumulated? a)- proportional b)- derivative c)- integral d)- on/off.