Exercise of Electromagnetic Induction

AI Thread Summary
The discussion revolves around understanding the role of the angle in electromagnetic induction problems. The angle, denoted as ø, is crucial for determining the magnetic flux through a coil, as it affects the rate of change of flux. A flat table would result in no flux, while a 90-degree angle would maximize it. Participants express confusion about the necessity of the angle in their calculations. Clarifying these concepts is essential for solving problems related to electromagnetic induction effectively.
cuongbui1702
Messages
31
Reaction score
0

Homework Statement


29-48-c29_zpsb2a9f9a6.png



Homework Equations


That is my solution:
29-48-c29_zps7b39cdac.png




The Attempt at a Solution


i solve my problem without ø=30°, I confused what this angle was used to do?
 
Physics news on Phys.org
Think about what your first formula is actually saying. It the rate of change of the flux through the coil. If the table was flat would there be any flux through it?
 
cuongbui1702 said:

Homework Statement


29-48-c29_zpsb2a9f9a6.png



Homework Equations


That is my solution:
29-48-c29_zps7b39cdac.png




The Attempt at a Solution


i solve my problem without ø=30°, I confused what this angle was used to do?

If the angle was 90 degrees would there be any flux through the coil?
 

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 'Collision of a bullet on a rod-string system: query'

Thread 'Collision of a bullet on a rod-string system: query'

In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
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

Sign of the Faraday-Lenz equation
Replies
1
Views
1K
Induction heat flux density induced by wire in a slab
Replies
0
Views
782
Solving Mutual Induction Exercise | Let's Get Started!
Replies
2
Views
1K
Question on Electromagnatic Induction
Replies
2
Views
1K
Find the magnetic induction vector
Replies
3
Views
706
Help using electromagnetic induction
Replies
4
Views
1K
Mutual inductance coefficient with so little info
Replies
13
Views
2K
Comparing self inductance of three solenoids
Replies
34
Views
3K
What does self induction per unit length signify?
Replies
7
Views
2K
Induction: Electromagnet and Aluminium Ring
Replies
1
Views
1K

Hot Threads

Recent Insights

Back
Top