In a meter bridge circuit, resistance in the left gap is and an unknown resistance is in the…
Physics20233 marksNumerical
In a meter bridge circuit, resistance in the left gap is $4\\,\Omega$ and an unknown resistance $R$ is in the right-hand gap as shown in Figure 2 below. The null point is found to be $40\text{ cm}$ from the left end of the wire.
Figure 2
(a)[1.5]
Calculate the value of the unknown resistance $R$.
(b)[1.5]
What change will you make in $R$ to bring the null point to the midpoint of the wire AB?
