AP EAMCET · PHYSICS · Current Electricity
A fuse wire of radius \(0.2 \mathrm{~mm}\) blows off with a current of \(5 \mathrm{~A}\). The fuse wire of same material but of radius \(0.3 \mathrm{~mm}\) will blow off with a current of
- A \(\frac{15}{2} \mathrm{~A}\)
- B \(\frac{5 \sqrt{3}}{2} \mathrm{~A}\)
- C \(5 \sqrt{\frac{27}{8}} \mathrm{~A}\)
- D 5 A
Answer & Solution
Correct Answer
(C) \(5 \sqrt{\frac{27}{8}} \mathrm{~A}\)
Step-by-step Solution
Detailed explanation
If \(I=\) current rating of fuse wire and \(r=\) radius of fuse wire, then relation, \(I^2 \propto r^3\)…
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