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A uniform wire initially of length and resistance is stretched so that its length…
PHYSICS · Single correct · CBSE · Physics · Electricity · Electricity
Problem
A uniform wire initially of length
L
L
L
and resistance
R
0
R_0
R
0
is stretched so that its length becomes three times the original value, the volume of the wire remaining unchanged. What is its new resistance
R
R
R
? (a)
3
R
0
3R_0
3
R
0
(b)
6
R
0
6R_0
6
R
0
(c)
9
R
0
9R_0
9
R
0
(d)
R
0
3
\dfrac{R_0}{3}
3
R
0
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