1. | \(12~\Omega\) | 2. | \(9~ \Omega\) |
3. | \(3~ \Omega\) | 4. | \(2~ \Omega\) |
The given circuit shows a uniform straight wire \(AB\) of \(40 ~\text{cm}\) length fixed at both ends. In order to get zero reading in the galvanometer \(G,\) the free end of \(J\) is to be placed from the end \(B\) at:
1. | \(32~\text{cm}\) | 2. | \(8~\text{cm}\) |
3. | \(16~\text{cm}\) | 4. | \(24~\text{cm}\) |
1. | do not play any significant role. |
2. | should be approximately equal to \(2X\). |
3. | should be approximately equal and are small. |
4. | should be very large and unequal. |