Question

An circuit has a section AB as shown in the fig. with E= 10V. (sf C_1) = 1.0 F, (sf C_2) = 2.0 F and the potential difference (sf V_a-V_b = 5V). The voltage across (sf C_1) is?

Answer 1

Without the fig, we know nothing about  AB,  C_1,  C_2,  V_a, or  V_b.
The probability of getting any kind of answer from anybody who hasn't
seen or tasted the fig is vanishingly small.