Question:
Which of the following cells is used in hearing aids?
Which of the following cells is used in hearing aids?
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Mercury cells are used in hearing aids, watches, and calculators due to their stable voltage and compact size.
Updated On: Feb 17, 2025
- Dry cell
- Mercury cell
- Nickel-cadmium cell
- Fuel cell
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The Correct Option is B
Solution and Explanation
Mercury cells are commonly used in hearing aids because they provide a stable and long-lasting voltage. They operate based on the reaction:
\[
\text{Zn} + \text{HgO} \rightarrow \text{ZnO} + \text{Hg}
\]
These cells have a small size and deliver a constant potential, making them ideal for sensitive electronic devices like hearing aids.
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