A) 9995
B) 99995
C) \[{{10}^{5}}\]
D) \[{{10}^{3}}\]
Correct Answer: A
Solution :
Resistance of the galvanometer \[I=\frac{E}{Z}=\frac{5}{628}A\] \[U=\frac{1}{2}L{{I}^{2}}=\frac{1}{2}\times 2\times {{\left( \frac{5}{628} \right)}^{2}}\] Number of divisions on the galvanometer scale \[=6.33\times {{10}^{-5}}\text{J}\] Current required for full scale deflection \[r=R\left[ \frac{{{l}_{1}}-{{l}_{2}}}{{{l}_{2}}} \right]=2\left[ \frac{240-120}{120} \right]\] \[=2\Omega \] Required range of voltmeter \[V=\frac{1}{4\pi {{\varepsilon }_{0}}}\frac{q}{R}\] Required series resistance \[V=\frac{1}{4\pi {{\varepsilon }_{0}}}\frac{q}{r},\]You need to login to perform this action.
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