CBSE Class 10 Answered

Dear Student

Fuse can take current up to a limit if it exceeds it gets melted because fo joule heating

joule heating  ---- I²R

R= SL /A       (Here + wire cross secion, L= length, a= Apecific sesistivity of material)

joule heating T  = I²SL /A    

If you use same material and length  for both the fuses melting temperature is same.

To allow higher current (15A)  snd should not exceed the temperature A should be more.

So 15 A fuse require thicker wire.

Regards

Team

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