Current Electricity

Question: The resistivity of iron is $1 \times {10^{ - 7}}\,ohm - m$. The resistance of a iron wire of particular length and thickness is 1 ohm. If the length and the diameter of wire both are doubled, then the resistivity in $ohm - m$ will be

1) $1 \times {10^{ - 7}}$

2) $2 \times {10^{ - 7}}$

3) $4 \times {10^{ - 7}}$

4) $8 \times {10^{ - 7}}$

Solution:

Explanation: No Explanation

Electric Conduction Ohm's Law Resistance

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