JEE MAIN - Physics (2022 - 28th June Evening Shift - No. 23)
All resistances in figure are 1 $$\Omega$$ each. The value of current 'I' is $${a \over 5}$$ A. The value of a is _________.
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Answer
8
Explanation
_28th_June_Evening_Shift_en_23_2.png)
Let the current is i
Using Kirchhoff's law
$$iR + {i \over 2}R + {i \over 4}R + {i \over 8}R = 3$$
$$i = {{3 \times 8} \over {15}} = {8 \over 5}A$$
So $$a = 8$$
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