Question 141: Current Electricity

Question

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 ____________ $$\Omega$$.

Accepted Answer

$${{43 + 2} \over {15}} = {{57} \over R}$$
$$R = {{57 	imes 15} \over {45}} = 19\,\Omega $$

Current Electricity

Integer / Numeric Answer Type