A wire of resistance 10 ohm is cut in to 2 equal halves and resultant pieces are connected in parallel predict what happens to the effective resistance A. Increases B. Decreases C. Remains same D. None of these
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Answer:
Decreases
Explanation:
The resistance of the material is directly connected to it’s length. So when the wire is cut cut into equal parts, then the resistance is reduced by the no of parts.
when 10 ohm wire is cut into 2 equal part. Then each part will have a resistance of 10/2 =5 ohm.
Again when connecting parallel, the total resistance will be,
=> 1/R = 1/5 + 1/5
=> R = 5/2
Therefore,
The Effective resistance decreases.
Hope it helps!
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