What is the magnetic field strength on Earth's surface at either pole?

AI Thread Summary
The magnetic field strength at Earth's surface near the poles is approximately 0.00006 tesla. The discussion references the Earth's magnetic dipole moment, denoted as D_0, and suggests using the dipole field for calculations. Participants express uncertainty about equating the dipole moment to the magnetic field strength. A link to additional data on magnetic field orders of magnitude is provided for further reference. Overall, the thread focuses on understanding the magnetic field strength at the poles using relevant equations and concepts.
tnutty
Messages
324
Reaction score
1

Homework Statement


What is the magnetic field strength on Earth's surface at either pole?

Earth's magnetic dipole moment is D_0

What is the magnetic field strength on Earth's surface at either pole?

B = ____ G

Homework Equations


_u = NIA ; N is the number of turns I is current, A is the corss sectional area


The Attempt at a Solution



I am not sure, they give _u = D_0, but U am not sure what to equate this to.
 
Physics news on Phys.org
Perhaps use the dipole field?
 
http://en.wikipedia.org/wiki/Orders_of_magnitude_(magnetic_field )

about .00006 tesla

Doesn't give the pole strength, but probably has the data you want.
 
Last edited by a moderator:

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
View full post »

Similar threads

Does levitation distance increase as Fg increase???
Replies
1
Views
917
Finding magnetic field using Ampere's Circuital Law
Replies
5
Views
987
Calculating Magnetic Field Strength and Force of Eddy Currents in a Solenoid
Replies
49
Views
5K
Deduction about Magnetic Poles surrounding a Conductor
Replies
40
Views
3K
Gravitational Field Strength at the equator and poles
Replies
23
Views
3K
Finding the Earth's magnetic field strength using a Galvanometer
Replies
13
Views
2K
Comparing Magnetic Field Strengths with Vectors
Replies
6
Views
2K
Magnetic field pointing into a normal magnetized compass needle
Replies
16
Views
1K
Does a Bent Wire Affect Induction Calculations?
Replies
7
Views
2K
(Magnetism) Magnetic pull force on a steel ball
Replies
4
Views
2K

Hot Threads

Recent Insights

Back
Top