A) A rheostat can be used as a potential divider
B) Kirchhoff's second law represents energy conservation
C) Wheatstone bridge is the most sensitive when all the four resistances are of the same order of magnitude.
D) In a balanced wheat stone bridge if the cell and the galvanometer are exchanged, the null point is disturbed.
Correct Answer: D
Solution :
[d] |
[a] |
On interchanging Cell & Galvanometer. |
On balancing condition |
\[\frac{{{R}_{1}}}{{{R}_{3}}}=\frac{{{R}_{2}}}{{{R}_{4}}}\] . |
On balancing condition |
\[\frac{{{R}_{1}}}{{{R}_{2}}}=\frac{{{R}_{3}}}{R}\] |
As we see both equation [a] & [b] are same. So |
4th statement is false. |
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