How Does Earth's Magnetic Field Flux Change with Loop Orientation?

AI Thread Summary
The discussion focuses on calculating the magnetic flux of Earth's magnetic field through a square loop under different orientations. The magnetic field strength is given as 5.00 x 10^-5 T, and the area of the loop is 40.0 cm². The first calculation is incorrect due to a misunderstanding of unit conversion, as 40 cm² should be converted to 0.004 m², not 0.4 m². The second calculation also fails because it relies on the incorrect first result and misapplies the cosine function for the angle. Accurate unit conversion and understanding the relationship between area and magnetic flux are crucial for solving the problem correctly.
goWlfpack
Messages
51
Reaction score
0
Magnetic flux!

Homework Statement


Find the flux of Earth's magnetic field of magnitude 5.00 10-5 T through a square loop of area 40.0 cm2 for the following:
(a) when the field is perpendicular to the plane of the loop



(b) when the field makes a 20.0° angle with the normal to the plane of the loop


Homework Equations



flux = BA cos theta
where A is the area and B is the magnetic field



The Attempt at a Solution


on the first one i just multiplied 5e-5 by .4 and i got 2.0e-5... and it was wrong and i have NO idea why

the second one i just used the answer i got previously (obviously wrong) and multiplied it by cos of 20... red x
HELP!
 
Physics news on Phys.org


You have to convert cm^2 to m^2 in the correct way
 


borgwal said:
You have to convert cm^2 to m^2 in the correct way

the correct way? its not directly proportional?
 


It's directly proportional, but not with the proportionality constant you think!

You seem to think that 40 cm^2 equals 0.4 m^2. That's not true!
 

Thread 'Errors and significant figures'

I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
View full post »
Thread 'A cylinder connected to a hanging mass'

Thread 'A cylinder connected to a hanging mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
View full post »

Similar threads

Direction and magnitude of electric field produced by current change
Replies
8
Views
991
Magnetic flux given magnetic field and sides (using variables)
Replies
7
Views
1K
Induced current and force on circular loop in varying magnetic field
Replies
4
Views
977
Magnetic flux- is this the correct way to solve it?
Replies
3
Views
1K
Magnetic flux through a loop at two orientations
Replies
5
Views
5K
Induced EMF in a moving Loop Conductor
Replies
3
Views
2K
How Is Magnetic Flux Calculated Through a Square Loop Inside a Solenoid?
Replies
4
Views
6K
Magnetic Flux Through a Square Loop
Replies
5
Views
9K
What is the induced magnetic force on this closed current loop?
Replies
12
Views
2K
Magnetic field affecting a circular loop
Replies
1
Views
1K

Hot Threads

Recent Insights

Back
Top