Twelve 6 ohm resistors are used to form an edge of a cube. The resistance between two diagonally opposite corner of the cube (in ohm) is ________(a) 5/6(b) 6/5(c) 5(d) 6This question was posed to me in quiz.My question is based upon Basic Concepts in division EDC Overview of Electronic Devices & Circuits

Twelve 6 ohm resistors are used to form an edge of a cube. The resista

1.	Twelve 6 ohm resistors are used to form an edge of a cube. The resistance between two diagonally opposite corner of the cube (in ohm) is ________(a) 5/6(b) 6/5(c) 5(d) 6This question was posed to me in quiz.My question is based upon Basic Concepts in division EDC Overview of Electronic Devices & Circuits
Answer» Correct choice is (c) 5 The BEST explanation: The current I will be DISTRIBUTED to the cube branches symmetrically. Connecting a VOLTAGE source Vab across the TERMINALS and applying kvl in the outer loop, we have => -Vab + (i/3+i/6+i/3)*R = 0(where R is given as 6ohm) => Vab = 5i => Req=Vab/i, which gives Req = 5OHM.

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