A) 4 : 7
B) 7 : 4
C) 16 :49
D) 49 : 16
Correct Answer: B
Solution :
\[Q=\frac{KA({{\theta }_{1}}-{{\theta }_{2}})}{l}t=\] \[\Rightarrow {{K}_{1}}{{t}_{1}}={{K}_{2}}{{t}_{2}}\] \[\Rightarrow \frac{{{K}_{1}}}{{{K}_{2}}}=\frac{{{t}_{2}}}{{{t}_{1}}}=\frac{35}{20}=\frac{7}{4}\] (As Q, l , A and \[({{\theta }_{1}}-{{\theta }_{2}})\] are same)
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