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A fuse wire with radius of 0.2mm blows o...

A fuse wire with radius of `0.2mm` blows off with a current of 5 Amp. The fuse wire of same material,but of radius 0.3 mm will blow off with a current of
(1) `5xx(3)/(2)Amp`
(2). `(5sqrt(3))/(2)Amp`
(3). `5sqrt((27)/(8))Amp`
(4). `5 Amp`

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