In the network of resistors shown in the adjoining figure, the equivalent resistance between $A$ and $B$ is ............ $ohm$
Medium
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The network can be redrawn as follows
$ \Rightarrow $ ${R_{eq}} = 9\,\Omega $
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In potentiometer experiment when $K_1$ is closed balance length is $100\,cm$. Then what will be balancing length when $K_2$ is closed ................ $\mathrm{cm}$
Two batteries of different $e.m.f.'s$ and internal resistance connected in series with each other and with an external load resistor. The current is $3.0 \,A$. When the polarity of one battery is reversed, the current becomes $1.0 \,A$. The ratio of the $e.m.f.'s$ of the two batteries is ............
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