A) 118 \[\Omega \]
B) 120 \[\Omega \]
C) 124 \[\Omega \]
D) 114 \[\Omega \]
Correct Answer: A
Solution :
The circuit diagram with current variation can be drawn as : Let current \[{{I}_{g}}\] flows through R and G. For a voltmeter with full scale reading, we have \[V={{I}_{g}}(G+R)\] or \[R=\frac{V}{{{I}_{g}}}-G\] Given, \[G=2\,\Omega ,\,V=12\] volt, \[{{I}_{g}}=0.1\,\,A\] \[R=\frac{12}{0.1}-2\] \[=120-2\] \[=118\,\,\Omega \]You need to login to perform this action.
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