Wednesday, April 25, 2012

Answer Key for Physics Question of The Week (3)


μ0  =  4π x 10-7  

I  =  5

r  =  30 cm =  .3 m

B  = 2 x 10-5

B  =  (μ0I) / (2πr)

(4π x 10-7)(5)  / (2π)(0.3)  =  (20 x 10-7)  /  (0.6)  =  (10 x 10-7)  /  (0.3)

(2 x 10-5)(tan θ)  =  (10 x 10-7)  /  (0.3) 

θ = 9.460




2 comments:

  1. where does the 10 X 10^-7 come from... the constant number that I was told to use was 4.0 X 10^-7.
    Also where does the tan theta come into the equation also ? it isnt in the original equation that was put up.

    Thanks,
    this problem has been hard to solve for me because I haven't grasped the equations yet but i still can't follow it with this answer.

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  2. Please see the detailed answer for explanation. If you have any more questions, feel free to contact me.

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