battery B = 200 volts, Rb = 0.1 ohm
Initial voltage of C = 100 volts.
Capacitor C = 100 farad, Rc = .01 ohm
Ra = 0.1 ohm,
La = .02 henry
speed constant of 0.2 volt / rpm
Frictional coefficient =0.002 nm/(rad/sec)
Inertia coefficient of the motor Jm = .01 nm/(rad/sec2)
Initially the switch A is" ON" and B was "off".
current Ia = 5 amps
what is the best way to cal. DC motor speed 
Re: what is the best way to cal. DC motor speed
