a wire have 10 ohm of resistence .what will be the new resistence if the resistivity is doubled ? explain
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When the wire is stretchedto 3 times radius will be reduced by √3. Cross sectional area will be reduced 3 times. Resistance will increase proportionally for the same length. is. 30 ohms for same original length and resistance for the 3 times the length will be 90 ohms.
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