Multiple choice

The battery capable of acting as water activated batteries is

  1. The penny battery

  2. A deep-cycle battery

  3. An earth battery

  4. A reserve battery

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

An earth battery is a pair of electrodes made of two dissimilar metals, such as iron and copper, which are buried in the soil or immersed in the sea. Earth batteries act as water activated batteries and if the plates are sufficiently far apart, they can tap telluric currents.