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Question
Four wires each of same length diameter and material are connected to each other to form a square. If the resistance of each wire is R, then the equivalent resistance across the opposite corners is:
Four wires each of same length diameter and material are connected to each other to form a square. If the resistance of each wire is R, then the equivalent resistance across the opposite corners is:
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Solution
The correct option is A R
Two wires in series will give 2R (R+R).
Two wires of 2R resistance in parallel will give R.
Hence, the total resistance will be R.
R
Two wires in series will give 2R (R+R).
Two wires of 2R resistance in parallel will give R.
Hence, the total resistance will be R.
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