A) \[\text{25}\,\text{Hz}\]
B) \[\text{50}\,\text{Hz}\]
C) \[12.25\,\text{Hz}\]
D) \[33\,\text{Hz}\]
Correct Answer: A
Solution :
Time period \[(T)=0.04s\] \[\therefore \] Frequency \[(f)=\frac{1}{T}=\frac{1}{0.04}\] \[=25Hz\]
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