1 answer

A potential difference of 1.40 V will be applied to a 41.00 m length of 18-gauge...

Question:

A potential difference of 1.40 V will be applied to a 41.00 m length of 18-gauge tungsten wire (diameter = 0.0400 in). Calculate the current.

Calculate the magnitude of the current density.

Calculate the magnitude of the electric field within the wire.

Calculate the rate at which thermal energy will appear in the wire.


Answers

Write the equation for current, i=- R 4 PL You know that R=- 102 Thus, Adv 4pl Substitute the value 0.04 in for d, 1.4V for V

J =- 4x(1.64 A) 3.14x(1.016x10 m) = 2.02x10Alm? Hence, the magnitude of current density is 2.02x100 A/m²). The electric field

.

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