the area of a cross section of a copper wire is 0.1964 × 1/ 10^6m². if the resistivity of the copper is 1.6 × 1/10^8 ohm meter, calculate the length of this copper wire to make its resistance 10 ohms
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R=ρl/A
10= 1.6 * 10^-8*l/0.1964*10^-6
l= 10* 0.1964/1.6*10^-2=196.4/1.6= 122.75 m is the length of the wire
10= 1.6 * 10^-8*l/0.1964*10^-6
l= 10* 0.1964/1.6*10^-2=196.4/1.6= 122.75 m is the length of the wire
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