A copper wire has a diameter 0.5 mm and resistivity 1.6 into 10 ki power minus 8 ohm metre what will be the the length of this wire to make the resistance of 12 Ohm how much will be the resistance of another copper wires of same length but half the diameter
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Answer:
Your answer is in above pic . I hope you got it
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Answer:
2.5×10-4 m
Explanation:
dia 0.5
0.5 ×10 to the power-3
5×10to the power -4
Radius=r=dia÷2
= 5×10to the power-4 upon 2 m
= 2.5 ×10to the power -4m
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