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Physics · 2014
JEE Main · 9 April 2014, Shift 1 · Q21
When the rms voltages V_L, V_C and V_R are measured respectively across the inductor L, the capacitor C and the resistor R in a series LCR circuit…
When the rms voltages $\displaystyle \mathrm{V}_{\mathrm{L}}, \mathrm{V}_{\mathrm{C}}$ and $\displaystyle \mathrm{V}_{\mathrm{R}}$ are measured respectively across the inductor L, the capacitor C and the resistor R in a series LCR circuit connected to an AC source, it is found that the ratio $\displaystyle \mathrm{V}_{\mathrm{L}}: \mathrm{V}_{\mathrm{C}}: \mathrm{V}_{\mathrm{R}}=1: 2: 3$. If the rms voltage of the AC source is $\displaystyle 100$ V, then $\displaystyle \mathrm{V}_{\mathrm{R}}$ is close to :
Official answer
(3)
$\displaystyle 90$ V
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JEE Main 2014 Physics question, with the answer from NTA’s final answer key. Where our answers come from.