[填空题]
Suppose two batteries, with unequal emfs of 2.00 V and 3.00 V, areqfy+j +fu1 *l:p j5nj7tf6blj connefrs) .l:ug8*8o : hl yiheak,scted as shown in (Fig. Below). If eac:,s8ho8gfe i hlyk .ulasr)*:h internal resistance is $r\,=\,0.100\Omega$ and $R\,=\,4.00\Omega$, what is the voltage across the resistor R? $V_R$ $\approx$ V (retain two decimal places)
