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The power through a cylindrical resistor is 2.4 W. If the radius of this resistor is...

The power through a cylindrical resistor is 2.4 W. If the radius of this resistor is 3.8 mm, calculate the length of the resistor. The resistivity of this resistor is 6.2 x10-5 Ω.m, and the magnitude of the current density is 2.6 x105 A/m2.

a. 32.6 mm

b. 72.6 mm

c. 12.6 mm

d. 52.6 mm

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Answer #1

P = 2.4 W

the current density is

Power is

the resistance is

Ans ===> c

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