A tungsten wire at with length, L = 1.83 m, carries a current with density, J = 1.35 x 10 A/m², at a temperature of 20°C, where its electrical conductivity is a = 1.80 x 107-¹m-¹. (a) Write a symbolic expression for the electric field strength in terms of J, 0, and L (as needed) then calculate its numeric value. E = O J = 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 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
A tungsten wire at with length, L = 1.83 m, carries a current with density, J = 1.35 x 10 A/m², at a temperature of 20°C, where its electrical conductivity is a = 1.80 x 107-¹m-¹. (a) Write a symbolic expression for the electric field strength in terms of J, 0, and L (as needed) then calculate its numeric value. E = O J = 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 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
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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, σ, and L (as needed) then calculate its numeric value.
J
E =
J = 0.75
o
Getting Warm (2 of 3)
The resistance of the wire at 20°C is determined to be R = 0.196 2.
| =
0.75 V/m ✔
(b) Write a symbolic expression for the current in terms of J, 0, L and R (as needed) then calculate its numeric value.
A
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