20. A 12 cm wire is given
a shape of a right
angled triangle ABC 3 cm 5 cm
having sides 3 cm, 4. ....
cm and 5 cm as shown B 4 cm
in the figure. The
resistance between two ends (AB, BC, CA) of
the respective sides are measured one by one by
a multi-meter. The resistances will be in the ratio
(a) 9:16:25 (b) 27:32:35
1(c) 21:24:25 (d) 3:4:5
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Answer:
ANS(d)3:4:5 because resistance varies directly as length
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