An ideal solenoid with 400 turns has a radius of 0.040 m and is ...

[Awilson837]

An ideal solenoid with 400 turns has a radius of 0.040 m and is 40 cm long. If this solenoid carries a current of 12 A, what is the magnitude of the magnetic field at the center of the solenoid? (0 = 4  10-7 T  m/
 
  A)
  A) 16 mT
  B) 4.9 mT
  C) 15 mT
  D) 6.0 mT
  E) 9.0 mT

Question 2

A laser with a power of 1.0 mW has a beam radius of 1.0 mm.
 
  What is the peak value of the electric field in that beam? (c = 3.0 x 108 m/s, 0 = 4  10-7 T  m/A, 0 = 8.85  10-12 C2/N  m2)
  A) 490 V/m B) 22 V/m C) 65 V/m D) 840 V/m E) 120 V/m

[tsternbergh47]

Answer to Question 1

C

Answer to Question 2

A

[Awilson837]

Both answers were spot on, thank you once again

[tsternbergh47]

Great! Please up vote