Questions
The rod given in the figure is made of two different materials. Both have square cross-section of side 3mm. The resistivity of the first material is and it is 25cm long while that of the second material is and is of length 70cm. The equivalent resistivity of the rod between its ends is __________(roundoff to nearest integer)
detailed solution
Correct option is D
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detailed solution
Correct answer is 4.74
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