Aluminum Wire Aluminum wire with cross-section 5.3 Time 10^-6 m^2 is used for in

Question

Aluminum Wire Aluminum wire with cross-section 5.3 Time 10^-6 m^2 is used for installation in houses. How much heat is generated in 10 m of this wire if it carries a current of 10 Amps? The bulk resistivity of aluminum is 2.7 Times10^-8 Ohm*m. A. 13. Watts. 38. Watts. 5.0 Watts. 7.5 Watts. 10. Watts. Assume B is directed into this page away from you. If there are no other forces, a free electron moving down the page will curve to the right. curve to the left. curve out the front of the page. curve back away from the page. continue in a straight line.

Explanation / Answer

heat will be generated at the alluminium wire is due to resistance

power dissipation p= i^2*R     

relation between resistivity , resistance area and length is

    rho = RA/ L
    P= i^2*rho*L/A
  
  
      = 100*2.7*10^-8*10 /5.3*10^-6
      = 5.094 W
   so answer is option C

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