both resistance will have same voltage across it which is equal to 5 volt.
if resistance value is different then voltage drop across them will be different.
current in both resistance would be same.
let's say resistance is 5 ohm of each one.
total current = total voltage / total resistance
= 10 /(5+5) = 10/10 = 1 amp
now voltage across 5 Ohm resistance = current × resistance = 1× 5 = 5 volt