Question

"A low voltage battery from which high current is required must have low internal resistance." Justify.

Hint:

To ensure a high current output, the internal resistance of the battery should be as low as possible.

Answer 1

A low voltage battery providing high current must have low internal resistance to prevent significant voltage drop across its internal resistance, thereby ensuring maximum current delivery to the load. According to Ohm’s law: \[ I = \frac{V}{R_{\text{total}}} \] Where \( V \) is the supply voltage, and \( R_{\text{total}} \) is the total resistance (which includes the internal resistance of the battery). For high current, \( R_{\text{total}} \) must be low, so the internal resistance must be minimized.