JEE MAIN - Physics (2022 - 28th June Morning Shift - No. 19)
A meter bridge setup is shown in the figure. It is used to determine an unknown resistance R using a given resistor of 15 $$\Omega$$. The galvanometer (G) shows null deflection when tapping key is at 43 cm mark from end A. If the end correction for end A is 2 cm, then the determined value of R will be ____________ $$\Omega$$.
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Respondre
19
Explicació
$${{43 + 2} \over {15}} = {{57} \over R}$$
$$R = {{57 \times 15} \over {45}} = 19\,\Omega $$