A) 1.5
B) 1
C) 2/3
D) 4
Correct Answer: A
Solution :
\[Q=\frac{KA({{\theta }_{1}}-{{\theta }_{2}})t}{l};\] in both the cases , A, l and \[({{\theta }_{1}}-{{\theta }_{2}})\] are same so Kt = constant Þ\[\frac{{{K}_{1}}}{{{K}_{2}}}=\frac{{{t}_{1}}}{{{t}_{2}}}=\frac{30}{20}=\frac{3}{2}\]= 1.5.
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