Solve: Magnetic Field on a Compass
Not what you're looking for?
Question: A power line is 3.5m off the ground and is carrying 75 amps. A man standing under the power line is holding a compass 1.25m off the ground.
1) How large is the magnetic field produced on the compass by the power line?
2) If the power line runs east and west, how does its magnetic field affect the direction in which the compass points?
3) If the power line runs north-south, how does the magnitic field affect the direction in which the compass points?
Purchase this Solution
Solution Summary
In about 340 words, including explanations and the appropriate calculations, the details for these three problems focused on the concept of magnetism are solved. A jpg document is also attached which corresponds to question two.
Solution Preview
1.)
Because,
Distance/height of the power line from the ground = 3.5 m
Distance/height of the observer from the ground = 1.25 m
Hence,
Distance of the observer from the power line (r)= 3.5-1.25 = 2.25 m
current in the power line (I)= 75 A
Because, magnetic field due to current carrying conductor:
B = k*2*I/r
Here, k= mu_o/4pi = 10^(-7) N/A^2
=> B = 10^(-7)*2*75/2.25 = 6.67*10^(-6) T = 6.67*10^(-2) Gauss
(because 1 Gauss = 10^(-4) T)
=> B = 0.067 Gauss (Answer) ...
Education
- BEng, Allahabad University, India
- MSc , Pune University, India
- PhD (IP), Pune University, India
Recent Feedback
- " In question 2, you incorrectly add in the $3.00 dividend that was just paid to determine the value of the stock price using the dividend discount model. In question 4 response, it should have also been recognized that dividend discount models are not useful if any of the parameters used in the model are inaccurate. "
- "feedback: fail to recognize the operating cash flow will not begin until the end of year 3."
- "Answer was correct"
- "Great thanks"
- "Perfect solution..thank you"
Purchase this Solution
Free BrainMass Quizzes
Basic Physics
This quiz will test your knowledge about basic Physics.
The Moon
Test your knowledge of moon phases and movement.
Introduction to Nanotechnology/Nanomaterials
This quiz is for any area of science. Test yourself to see what knowledge of nanotechnology you have. This content will also make you familiar with basic concepts of nanotechnology.
Variables in Science Experiments
How well do you understand variables? Test your knowledge of independent (manipulated), dependent (responding), and controlled variables with this 10 question quiz.
Intro to the Physics Waves
Some short-answer questions involving the basic vocabulary of string, sound, and water waves.