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A copper wire has a diameter 0.5 mm and ...

A copper wire has a diameter 0.5 mm and resistivity `1.6 xx 10^(-2)m`.
(i) What will be the length of this wire to make the resistance of `12Omega`?
(ii) How much will be the resistance of another copper wire of same length but half the diameter?

Text Solution

Verified by Experts

(i) 147.3 m (ii) `48Omega`
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Knowledge Check

  • A copper wire has a diameter of 0.5 mm and a resistivity of 1.6 xx 10^-6 ohm cm. How much of this wire would be required to make a 10 ohm coil ? How much does the resistance change if the diameter is doubled ?

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    B
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    C
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    D
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  • What length of the wire of specific resistance 48 xx 10^(-8) Omegam is needed to make a resistance of 4.2 Omega (diameter of wire = 0.4 mm )

    A
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    B
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    C
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    D
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