  We calculate the effective Komar conserved quantities for the $N+1$
dimensional charged Myers-Perry spacetime. At the event horizon we derive a new
identity $K_{\chi^{\mu}}=2ST$ where the left hand side is the Komar conserved
quantity corresponding to the null Killing vector $\chi^{\mu}$ while in the
right hand side $S,~T$ are the black hole entropy and Hawking temperature. From
this identity we also derive the generalized Smarr formula connecting the
macroscopic parameters $M,~J,~Q$ of the black hole with its surface gravity and
horizon area. The consistency of this new formula is established by an
independent algebraic approach.
