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6 Oct 2020
Two wires A and B with circular cross-sections are made of the same metal and have equal lengths, but the resistance of wire A is three times greater than that of wire B. (i) What is the ratio of the cross-sectional area of A to that of B?
(a) 3 (b) √3 (c) 1 (d) 1/√3 (e) 1/3
(ii) What is the ratio of the radius of A to that of B? Choose from the same possibilities as in part (i).
Two wires A and B with circular cross-sections are made of the same metal and have equal lengths, but the resistance of wire A is three times greater than that of wire B. (i) What is the ratio of the cross-sectional area of A to that of B?
(a) 3 (b) √3 (c) 1 (d) 1/√3 (e) 1/3
(ii) What is the ratio of the radius of A to that of B? Choose from the same possibilities as in part (i).
B. Haranadh KumarLv10
29 Nov 2020
