Question 4 of 6 Question 5 of 6 Question 6 of 6 Question 4 of 6 5.0 Points What

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Question 4 of 6

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Question 6 of 6

Question 4 of 6

5.0 Points What is the energy stored in the magnetic field of the solenoid? A. 9.00 × 104 J B. 7.50 × 104 J C. 1.50 × 103 J D. 3.00 × 103 J E. 1.50 × 105 J Reset Selection

Question 5 of 6

5.0 Points What is the magnetic energy per unit volume? A. 5.31 × 105 J/m3 B. 2.65 × 105 J/m3 C. 2.50 × 105 J/m3 D. 3.18 × 105 J/m3 E. 1.06 × 104 J/m3 Reset Selection

Question 6 of 6

5.0 Points What is the magnitude of the magnetic field of the solenoid? A. 1.15 T B. 0.816 T C. 0.163 T D. 0.894 T E. 0.793 T Reset Selection

Explanation / Answer

part 4 )

U = LI^2/2

U = 60 * (50)^2/2

U = 7.5 x 10^4 J ( B option )

part 5 )

n = U/V

V = volume = pi*r^2*h

n = 265258.2 = 2.65 x 10^5 J/m^3 ( B option )

part 6 )

n = B^2/2uo

2.65 x 10^5 = B^2 /2 * 4pi*10^-7

B = 0.816 T

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