A) Will be doubled
B) Will be halved
C) Will remain the same
D) Will be quadrupled
Correct Answer: A
Solution :
\[H\propto \frac{1}{R}\] (If V = constant) Þ \[\,\frac{{{H}_{1}}}{{{H}_{2}}}=\frac{{{R}_{2}}}{{{R}_{1}}}\]\[=\frac{{{l}_{2}}{{A}_{1}}}{{{l}_{1}}{{A}_{2}}}\]\[=\frac{{{l}_{2}}r_{1}^{2}}{{{l}_{1}}r_{2}^{2}}\] Þ \[{{H}_{2}}=2{{H}_{1}}\]
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