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8. A wire whose resistance is 40 is cut intothree pieces of equal lengths which are thenjoined in parallel. Calculate the resistanceof the combination |
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Answer» Explanation: LENGTH is directly PROPORTIONAL to resistance so when the wire is cut into 3 parts the resistance ALSO becomes 1 by 3 TIMES therefore the resistance of each SMALL part is 40/3 As they are connected in parallel effective resistance =40/3/3=40/9 I hope that the answer is clear............. |
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