To find the total voltage developed by the battery consisting of five dry cells connected in series, you simply add the voltage of each cell together.
Each cell has a voltage of 1.5 V. Therefore, for five cells:
Total voltage = Number of cells × Voltage per cell Total voltage = 5 × 1.5 V = 7.5 V
So, the total voltage developed by the battery is:
C) 7.5 V.