10 Cells each with an EMF of 1.5 V and an internal resistance of 0.1Ω are connected in series. What will be the total EMF and resistance of the circuit?

Correct option is C

​$$\therefore E_T = E_1 + E_2 + \cdots + E_{10} \\E_T = n \times E \\E_T = 10 \times 1.5 \\E_T = 15 \text{ V Ans.} \\r_T = r_1 + r_2 + \cdots + r_{10} \\r_T = n \times r \\r_T = 10 \times 0.1 \\r_T = 1\Omega \text{ Ans.}$$​​