A battery of emf \( \varepsilon_{0}=5 \mathrm{~V} \) and internal resistance \( 5 \Omega \) is c...

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A battery of emf \( \varepsilon_{0}=5 \mathrm{~V} \) and internal resistance \( 5 \Omega \) is connected across a long uniform wire \( A B \) of length \( 1 \mathrm{~m} \) and resistance per unit length \( 5 \Omega \mathrm{m}^{-1} \). Two cells of \( \varepsilon_{1}=1 \mathrm{~V} \) and \( \varepsilon_{2}=2 \mathrm{~V} \) are connected as shown in the figure.
(a) The null point is at \( A \)
(b) If the Jockey is touched to point \( B \) the current in the galvanometer will be going towards \( B \)
(c) When Jockey is connected to point A no current is flowing through \( 1 \mathrm{~V} \) battery
(d) The null point is at distance of \( 8 / 15 \mathrm{~m} \) from \( A \)
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