A tungsten wire at with length, L = 1.83 m, carries a current with density, J = 1.35 x 107 A/m², at a temperature of 20°C, where its electrical conductivity is a = 1.80 x 1072-1.m-1. (a) Write a symbolic expression for the electric field strength in terms of J, σ, and L (as needed) then calculate its numeric value. E σ Getting Warm (2 of 3) 0.75 | = 0.75 V/m ✔ The resistance of the wire at 20°C is determined to be R = 0.196 2. (b) Write a symbolic expression for the current in terms of J, 0, L and R (as needed) then calculate its numeric value.
A tungsten wire at with length, L = 1.83 m, carries a current with density, J = 1.35 x 107 A/m², at a temperature of 20°C, where its electrical conductivity is a = 1.80 x 1072-1.m-1. (a) Write a symbolic expression for the electric field strength in terms of J, σ, and L (as needed) then calculate its numeric value. E σ Getting Warm (2 of 3) 0.75 | = 0.75 V/m ✔ The resistance of the wire at 20°C is determined to be R = 0.196 2. (b) Write a symbolic expression for the current in terms of J, 0, L and R (as needed) then calculate its numeric value.
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Transcribed Image Text:A tungsten wire at with length, L = 1.83 m, carries a current with density, J = 1.35 x 107 A/m²,
at a temperature of 20°C, where its electrical conductivity is a = 1.80 x 1072-¹.m-¹.
(a) Write a symbolic expression for the electric field strength in terms of J, o, and L (as needed) then calculate its numeric value.
E =
O
0.75
| =
0.75 V/m ✔
Getting Warm (2 of 3)
The resistance of the wire at 20°C is determined to be R = 0.196 Q.
(b) Write a symbolic expression for the current in terms of J, 0, L and R (as needed) then calculate its numeric value.
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