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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 74 times)

abern

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on: Jul 29, 2018
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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Reply #1 on: Jul 29, 2018
Answer to Question 1

A

Answer to Question 2

B


abern

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Reply 2 on: Jul 29, 2018
:D TYSM

billybob123

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Reply 3 on: Yesterday
Excellent

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