in electonics we can control the flow of current bu another
one current (i.e we control the electricity by electricty)
in SCR we can control the flow of current BY APPLYING THE
GATE CURRENT . IT MEANS WE R CONTROL THE FLOW OF
ELECTRICITY BY CONTROLLING THE ELECRICTY OF GATE
IN CASE OF ELECTRICAL WE CANNOT DO THAT ABOVE
THE SWITCHES, RELAYS, CIRCUIT BREAKERS ARE CONTROL THE
CURRENT BY MECHANICAL ACTION ONLY.
A separately excited dc motor having 2 ohm armature
resistsance draws a current of 10A and torque developed is
20 Nm under rated field condtion. the speed of the motor
under the rated field condtion , when it is connected to a
100V DC source and delivering 10Nm torque....