VT = Terminal Voltage, Rexternal = 5.6 ohms, Rinternal = Ri = 0.2 ohms

Let the current in the circuit be I amperes.

(1) VT = I Rexternal => I = VT / Rexternal = 10 / 5.60 = 1.786 A

(2) Let the EMF of the battery be denoted by E.

VT = E - I * Ri

=> E = VT + I * Ri = 10 + (1.786 * 0.2) = 10 + 0.357 = 10.357 V

Let the current in the circuit be I amperes.

(1) VT = I Rexternal => I = VT / Rexternal = 10 / 5.60 = 1.786 A

(2) Let the EMF of the battery be denoted by E.

VT = E - I * Ri

=> E = VT + I * Ri = 10 + (1.786 * 0.2) = 10 + 0.357 = 10.357 V