A 2-column table with 4 rows. The first column labeled substance has entries calcium chloride, calcium bromide, calcium carbonat
2 answers:
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Explanation:
We have,
Surface area,
The current varies wrt time t as :
(a) At t = 2 seconds, electrical charge is given by :
(b) Current is given by :
Instantaneous current at t = 1 s is,
(c) Current is,
Current density is given by electric current per unit area.
Therefore, it is the required explanation.