A copper wire of resistance R is made in such a way that its area is increased times . Find the new resistance R
Answers
Answered by
1
Hyyy
Resistance= Resistivity x length/area
When the wire is stretched to double the length , the area of cross section gets reduced to half.
So when
New Resistance = Resistivity x 2length/area/2
New resistance = (Resistivity x area/length)x4
i.e, New resistance = Resistance x 4
So when the wire is stretched, the resistance multiplies by four times.
Hope you understood.
Resistance= Resistivity x length/area
When the wire is stretched to double the length , the area of cross section gets reduced to half.
So when
New Resistance = Resistivity x 2length/area/2
New resistance = (Resistivity x area/length)x4
i.e, New resistance = Resistance x 4
So when the wire is stretched, the resistance multiplies by four times.
Hope you understood.
karthikkrishnap7sfnr:
Can you say me how the new resistance became 4 times the resistance
In the question I said area of cross section is increased
Plz help me out
Similar questions