The figure shows a network of currents. The magnitude of currents is shown here. The current $i$ will be ................. $A$
Medium
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(c) By Kirchhoff's current law.
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Two electric bulbs rated ${P_1}\,watt$ $V\, volts$ and ${P_2}\, watt$ $V\, volts$ are connected in parallel and $V\, volts$ are applied to it. The total power will be
Space between two concentric conducting spheres of radii $a$ and $b (b > a)$ is filled with $a$ medium of resistivity $\rho $. The resistance between the two spheres will be
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