if a length of copper wire has two sections the first 2.8 m section has a diameter of .65mm, and there is a 5.5mA current in that section. the other portion is also 2.8 m in length with a diameter of 1.5 mm find the current in the second portion of the wire. I get 29.3 mA if someone could check that I would be grateful.

Question

if a length of copper wire has two sections the first  2.8 m section has a diameter of .65mm, and there is a 5.5mA current in that section. the other portion is also 2.8 m in length with a diameter of 1.5 mm find the current in the second portion of the wire.  I get 29.3 mA if someone could check that I would be grateful.

anonymous · Answer

The question also states that the temperature is 20 degrees C (but I think that was extraneous information.)

radar · Answer

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