Three identical cells are connected in parallel across $A B$. Net emf across $A B$ is .......... $V$
Medium
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(a)
$E_{\text {net }}=\frac{\frac{10}{3}+\frac{10}{3}+\frac{10}{3}}{\frac{1}{3}+\frac{1}{3}+\frac{1}{3}}=10$ volt
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In a potentiometer experiment the balancing with a cell is at length $240\,cm$ . On shunting the cell with a resistance of $2\,\Omega $ , the balancing length becomes $120\, cm$ . The internal resistance of the cell is ................... $\Omega$
In the following circuit, $5$ $\Omega$ resistor develops $45$ $J/s$ due to current flowing through it. The power developed per second across $12$ $\Omega$ resistor is ............. $W$
Twelve resistors each of resistance $16 \,\Omega $ are connected in the circuit as shown. The net resistance between $AB$ (any two conjugate points of outer square) is ............... $\Omega$