Power and Energy

Power:- Rate of change of energy.

·                  P=dW/dt (Watt)

·                  P=dW/dq *  dq/dt

·                  P=V.I ->DC power

·                  p(t)=v(t).i(t) -> Instantaneous power

Energy:- Capacity to do work is called energy.

·                  P=dW/dt

·                  W=∫P.dt

·                  W=∫V.i(t).dt

·                  W=V.I.t (Joule)