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In a network as shown in the figure the potential difference across the resistance \( 2 \mathrm{...
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In a network as shown in the figure the potential difference across the resistance \( 2 \mathrm{R} \) is (the cell has an emf \( \mathrm{E} \) with no internal resistance) :
(1) \( 2 \mathrm{E} \)
(2) \( \frac{4 E}{7} \)
(3) \( \frac{E}{7} \)
(4) \( E \)
(1) \( 2 \mathrm{E} \)
(2) \( \frac{4 E}{7} \)
(3) \( \frac{E}{7} \)
(4) \( E \)