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, \[G=2\Omega ,V=12\,volt,\,{{I}_{g}}=0.1\,A\] \[\therefore \] \[R=\frac{12}{0.1}-2\] \[=120-2\] \[=118\,\Omega \]You need to login to perform this action.
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