A cylindrical conductor of length 'l' and uniform area of the cross section a has resistance are another conductor of length 2.5 l and resistance 0.5 are of the same material has area of cross section
A.5a
B.2.5a
C.O.5a
D.1/5a
Answers
Answered by
1
Answer:
and your answer is c 0.5 a
Answered by
0
The area of the cross section of the material is 5 times of the initial area.
Explanation:
A cylindrical conductor of length l and uniform area of cross-section A has resistance R. The resistance of the conductor is given by :
...........(1)
Another conductor of length 2.5 l and resistance 0.5 R of the same material. New resistance is given by :
........(2)
Dividing equation (1) and (2). We get :
So, the area of the cross section of the material is 5 times of the initial area. Hence, the correct option is (A).
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Resistance
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