A copper wire has a diameter 0.5 mm and resistivity 1.6 X10-8ohm m. (i) What will be the length of this wire to make the resistance of 12 Ohm
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Answer:
Approximately 1.47 × 10^ 2 cm
Explanation:
FORMULA;. Resistance =(resistivity × length)÷Area
then l= (12 ×π×(0.25 ×10^-3)^2) ÷ 1.6×10^-8
Answer will be ~ 1.47 ×10^2.
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