The instantaneous value of power in purely inductive circuit is changing as it is given as v*i. The average power of purely inductive circuit over a cycle is zero
three types of electric breaking: Regenerative breaking( leads to economic and energy consevation) pugging (more efficient method of breaking) rheostatic breaking
In hopkinson test known as regenerative test two identical machine coupled D.C shunt motor D.C shunt generator temperature rise can be check under rated condition large machine can be tested without drawing much power.
EXAMIANS