Determine the voltage on the section of the circuit if, when moving along this section

Determine the voltage on the section of the circuit if, when moving along this section of the charge circuit of 42 cells, a work of 0.252 kJ was performed?

The work of electric current can be found by the formula:
A = q * U, where A is the work done by the charge (A = 0.252 kJ = 0.252 * 10 ^ 3 J), q is the electric charge passed through the section of the circuit (q = 42 C), U is the voltage on the section of the circuit (V ).
Let us express and calculate the voltage on the circuit section:
U = A / q = (0.252 * 10 ^ 3) / 42 = 6 V.
Answer: The voltage on the circuit section is 6 V.