Physics
Assertion (A) : Primary cells are use and throw types.
Reason (R) : Primary cells provide current as a result of irreversible chemical reaction.
- both A and R are true and R is the correct explanation of A
- both A and R are true and R is not the correct explanation of A
- assertion is false but reason is true
- assertion is true but reason is false
Current Electricity
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Answer
both A and R are true and R is the correct explanation of A
Explanation
Assertion (A) is true because primary cells (like dry cells, alkaline batteries) are non-rechargeable. Once their chemical reaction is completed, they cannot be reused, so they are discarded after use.
Reason (R) is true because in primary cells, the chemical reaction is irreversible, which means the chemicals cannot be restored to their original form by passing a current therefore, the cell cannot be recharged. Hence, reason correctly explains assertion.
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