JEE MAIN - Physics (2021 - 20th July Evening Shift - No. 21)
In the given figure switches S1 and S2 are in open condition. The resistance across ab when the switches S1 and S2 are closed is _____________ $$\Omega$$.
_20th_July_Evening_Shift_en_21_1.png)
Answer
10
Explanation
When switch S1 and S2 are closed
_20th_July_Evening_Shift_en_21_2.png)
Rab = $${{12 \times 6} \over {12 + 6}} + 2 + {{6 \times 12} \over {6 + 12}}$$
= $${{72} \over {18}} + 2 + {{72} \over {18}} = 4 + 2 + 4 = 10\Omega $$
Rab = $${{12 \times 6} \over {12 + 6}} + 2 + {{6 \times 12} \over {6 + 12}}$$
= $${{72} \over {18}} + 2 + {{72} \over {18}} = 4 + 2 + 4 = 10\Omega $$
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