A) RA = RB = RC
B) RA > RB > RC
C) RA < RB < R
D) Information is not sufficient
Correct Answer: A
Solution :
All the conductors have equal lengths. Area of cross-section of A is \[\{{{(\sqrt{3}\,a)}^{2}}-{{(\sqrt{2}\,a)}^{2}}\}={{a}^{2}}\] Similarly area of cross-section of B = Area of cross-section of C = a2 Hence according to formula \[R=\rho \frac{l}{A};\] resistances of all the conductors are equal i.e. RA = RB = RC
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