The emfs and resistance in the circuit (as shown in the figure) have the following values.

Answer

C

Explanation

Energy loss `= (1)/(2)(m_(1) m_(2))/((m_(1) + m_(2)))(u_(1) - u_(2))^(2)`
`= ((0.5)(1))/(2[0.5 + 1]) (2 - 0)^(2) = (2)/(3) J`