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JEE Main 2019 (Online) 10th January Morning Slot
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A potentiometer wire AB having length L and resistance 12 r is joined to a cell D of emf $$\varepsilon $$ and internal resistance r. A cell C having emf $$\varepsilon $$/2 and internal resistance 3r is connected. The length AJ at which the galvanometer as shown in figure shows no deflection is –

JEE Main 2019 (Online) 10th January Morning Slot Physics - Current Electricity Question 255 English
A
$${{11} \over {12}}L$$
B
$${{13} \over {24}}L$$
C
$${{5} \over {12}}L$$
D
$${{11} \over {24}}L$$
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