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Author Question: If a current of 2.4 A is flowing in a cylindrical wire of diameter 2.0 mm, what is the average ... (Read 137 times)

abern

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If a current of 2.4 A is flowing in a cylindrical wire of diameter 2.0 mm, what is the average current density in this wire?
 
  A) 7.6  105 A/m2
  B) 5.2  10-6 A/m2
  C) 1.9  105 A/m2
  D) 3.6  105 A/m2
  E) 21  10-6 A/m2

Question 2

A negative charge, if free, will tend to move
 
  A) from high potential to low potential.
  B) from low potential to high potential.
  C) toward infinity.
  D) away from infinity.
  E) in the direction of the electric field.



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sailorcrescent

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Answer to Question 1

A

Answer to Question 2

B




abern

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Reply 2 on: Jul 29, 2018
Gracias!


amandalm

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Reply 3 on: Yesterday
Great answer, keep it coming :)

 

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