A) Equal to \[5\,\Omega \]
B) Greater from \[5\,\Omega \]
C) Less than \[5\,\Omega \]
D) Greater or less than \[5\,\Omega \] depends on the material of R
Correct Answer: C
Solution :
If resistance of ammeter is r then \[20=(R+r)4\] Þ \[R+r=5\] Þ \[R<5\,\Omega \]
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