A 18ohm resistance wire is tripled on itself . Calculate the new resistance
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Answer:
R=s*l/a therefore if the length is (1/3)rd , then resistance will also be (1/3)rd
therefore, resistance of each resistor is now (1/3)*9 = 3 ohm
Now, these 3 resistors are joined in parallel. So total resistance =(1/3)*3= 1 ohm (ans)
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That is, the new resistance is nine times the old resistance.
Hence, the new resistance is 9×9=81ohms.
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