Physics · 2025
JEE Main · 2 April 2025, Shift 1 · Q35
The battery of a mobile phone is rated as 4.2 V, 5800 mAh. How much energy is stored in it when fully charged?
The battery of a mobile phone is rated as $\displaystyle 4.2 \mathrm{~V}, 5800 \mathrm{mAh}$. How much energy is stored in it when fully charged ?
Official answer
From NTA’s final answer key for this paper.
(2)
87.$\displaystyle 7$ kJ
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JEE Main 2025 Physics question, with the answer from NTA’s final answer key. Where our answers come from.