How does the resistance and resistivity of a metallic wire vary if:
a) Its length is halved
b) Its area of cross-section gets doubled?
Answers
Answered by
3
Explanation:
the resistance of a conductor is directly proportional to its length. ... so if length is doubled resistance will also get doubled i.e resistance is 4 times that of original resistance. now, the resistance of a conductor is inversely proportional the area of cross section
Answered by
1
Answer:
R= pL/A
If length (L)i s halved than Resistance is also halved
If cross section(A) is doubled than Resistance (R) will also becomes half of initial value
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