Resistance of a wire is 8 ohms. It is drawn in such away that it experiences a longitudinal strain of 400%. The new resistance is?
Answers
Answered by
8
Answer:
R = 2 ohm
L’ = 200 %
L’ = L + (200/100)L
L’ = L + 2L = 3L
(L’/L) = 3
Vol. remains same,
A’L’ = AL
(A’/A) = (L/L’) => 1/3
A’ = A/3
R’ = p(L’/A’) = p(3L)3/A = [pL/A] 9 = R9 = 9R = 9 * 2 = 18 ohm
Answered by
15
Answer:200 ohms
Explanation:
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