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Physics
Physics
Problem
A wire has resistance
R
R
R
. Its length and diameter are both doubled without any change in material or temperature. What will be its new resistance? a)
R
R
R
b)
R
4
\dfrac{R}{4}
4
R
c)
R
2
\dfrac{R}{2}
2
R
d)
2
R
2R
2
R
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