Calculating EMF for Disk of Area 0.003m2 in Perimeter

  • Thread starter Thread starter nugget
  • Start date Start date
  • Tags Tags
    Emf
AI Thread Summary
To calculate the EMF for a disk with an area of 0.003 m² in a perpendicular magnetic field increasing at 0.02 T per second, Faraday's law of induction is applied. The magnetic flux (phi) is calculated as phi = B x A, resulting in a value of 0.00006 Wb. Using the formula E = -N(phi)/t, with N as the number of turns (1) and t as 1 second, the EMF is determined to be -0.00006 V. The units of EMF are confirmed to be Volts. The calculations and application of the relevant equations are correct.
nugget
Messages
44
Reaction score
0

Homework Statement



S is a disk of Area 0.003m2, B is a magnetic field perpendicular to S and increasing at 0.02 T per second. What is the EMF in the perimeter of S?

Homework Equations



I assume we need a formula relating Area, B and emf - Faraday's law of induction? or possibly phi = BAcos(phi)

The Attempt at a Solution



phi - BxA = .003x.02 = .00006

E = -N(phi)/t

t = 1 second
N = 1
therefore E = -.00006

is this right? what are the units of EMF?
 
Physics news on Phys.org
You have all the ingredients to put it together. The units of emf are Volts.
 

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

Faraday's law help -- Induced EMF vs. time graph
Replies
7
Views
2K
Direction and magnitude of electric field produced by current change
Replies
8
Views
997
How to obtain correct negative sign in calculation of motional emf?
Replies
2
Views
894
Current in circular wire surrounding infinite solenoid in a circuit
Replies
7
Views
1K
What is the amplitude of induced EMF in a magnetic dipole antenna?
Replies
3
Views
2K
Electromagnetic Induction of a Disk
Replies
5
Views
3K
Induced EMF — generator coil area calculation
Replies
4
Views
1K
Going From EMF to Faraday's Law to find E-field in my HW problem
Replies
6
Views
2K
Understanding a very simply RL circuit
Replies
1
Views
755
Fairly hard induced EMF problem
Replies
14
Views
2K

Hot Threads

Recent Insights

Back
Top