[填空题]
Calculate the terminal voltag+a phx8 )(i ,spehdac8e for a battery with an internal resis :m,lgt,ofrs.8sc ,hf tance of $0.900\Omega$ and an emf of $8.50\,V$ when the battery is connected in series with
(a) an $81.0-\Omega$ resistor, V
(b) an $810-\Omega$ resistor. V