A) 3.0
B) 2.1
C) 1.56
D) 1.7
Correct Answer: C
Solution :
\[f=\frac{1}{2\pi \sqrt{LC}}\] or \[f\propto \frac{1}{\sqrt{C}}\] When capacitor\[C\]is replaced by another capacitor \[C\] of dielectric constant\[K\], then \[C=KC\] \[\therefore \] \[\frac{f}{f}=\sqrt{\frac{C}{C}}\] or \[\frac{125000-25000}{125000}=\sqrt{\frac{C}{KC}}\] or \[\frac{100}{125}=\frac{1}{\sqrt{K}}\] or \[K={{\left( \frac{125}{100} \right)}^{2}}=1.56\]You need to login to perform this action.
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