The power P in a circuit is p=ri² where R is resistance and I is the current. Find dp/dtat t= 1/3if R=2500Ω and I varies according to I=sin(4πt).
a) dp/dt=-500π/3 W/s
b) dP/dt=−100π W/s
c) dP/dt =2500π/3 W/s
d.dP/dt=500π W/s