Following figure shows $$cross-sections$$ through three long conductors of the, same length and material, with square $$cross-section$$ of edge lengths as shown. Conductor B will fit snugly within conductor A, and conductor C will fit snugly within conductor B. Relationship between theirend to end resistance is

Question

Infinity Learn · Accepted Answer

All the conductors have equal lengths. Area of $$cross-section$$ of, A is $$3$$ $$a2$$ − $$2$$ $$a2=a2Similarly$$ area of $$cross-section$$ of B $$-$$ Area of $$cross-section$$ of C $$=$$ $$a2Hence$$ according to formula $$R=$$ρ. lA; resistances ofall the conductors are equal i.e., RA $$=$$ RB $$=$$ RC

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