The figure shows a network of currents. The magnitude of currents is shown here. The current $i$ will be ................. $A$
A$3 $
B$13$
C$23$
D$-3$
Medium
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C$23$
c (c) By Kirchhoff's current law.
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$10$ wires (same length, same area, same material) are connected in parallel and each has $1$ $\Omega$ resistance, then the equivalent resistance will be .............. $\Omega$
For comparing the $e.m.f.$'s of two cells with a potentiometer, a standard cell is used to develop a potential gradient along the wires. Which of the following possibilities would make the experiment unsuccessful
Current $l$ versus time $t$ graph through a conductor is shown in the figure. Average current through the conductor in the interval $0$ to $15 \,s$ is ............ $A$