A solenoid of length l = 0.7 m and radius R = 5 cm stores an ...

[jman1234]

A solenoid of length l = 0.7 m and radius R = 5 cm stores an amount of energy U = 6  10-6 J when a current I = 0.4 A passes through it. What is the winding density of the solenoid?
 
  A)
 
  865 turns /m
  B)
 
  472 turns/m
  C)
 
  1078 turns/m
  D)
 
  104 turns/m
  E)
 
  327 turns /m

Question 2

The acceleration of gravity can vary locally on the Earth's surface because of the presence of rocks of different densities.
 
  Indicate whether the statement is true or false

[anyusername12131]

Answer to Question 1

D

Answer to Question 2

TRUE

[jman1234]

Excellent

[strudel15]

TYSM