a wire of resistance r is stretched to double its length. how does it affect the (a) resistance (b) resistivity and write to answer
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resistance is proportional to length so it gets doubled. 2r
resistivity doesnt change with shape or size it depends on material
but remember that in question it is given that wire is stretched. so practically it will decrease its area of cross section.here it can be assumed that area is same after stretching
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resistivity doesnt change with shape or size it depends on material
but remember that in question it is given that wire is stretched. so practically it will decrease its area of cross section.here it can be assumed that area is same after stretching
check my bio and follow me i can help more
mark it as brainliest if possible
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