the resistance of meter bridge AB in given figure is . With the cell of emf and rehostat resistance Rh = the null point is obtained at some point J. When the cell is replaced by another one of emf the same null point J is found for . The emf is:
0.6 V
0.4 V
0.3 V
0.5 V
Meter bridge -
- wherein
When
Let null point be at l cm
for
0.6 V
Option 2)0.4 V
Option 3)0.3 V
Option 4)
0.5 V
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