A) 4v
B) 2v
C) v/2
D) v/4
Correct Answer: B
Solution :
[b] \[\frac{{{\left( {{V}_{rms}} \right)}_{1}}}{{{\left( {{V}_{rms}} \right)}_{2}}}=\sqrt{\frac{{{T}_{1}}}{{{T}_{2}}}}\Rightarrow \frac{V}{{{\left( {{V}_{rms}} \right)}^{2}}}=\sqrt{\frac{120}{480}}\] \[\Rightarrow \frac{V}{\left( {{V}_{rms}} \right){{ & }_{2}}}=\frac{1}{2}\Rightarrow {{\left( {{V}_{rms}} \right)}_{2}}=2V\]
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