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14. Following figure shows cross-section...

14. Following figure shows cross-section 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 their end to end resistance is

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

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

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Show that for a conductor R = P l/A where L is the length and A is the cross sectional area of the conductor.