Emf in a loop of radius a=1 as a function of time.

In summary, the problem asks for the EMF in a circular loop located in a plane EM wave in vacuum, with given parameters of amplitude, wavelength, and orientation. To solve this, we can use Faraday's law of induction to calculate the induced emf, which is equal to the rate of change of magnetic flux through the loop. We can assume that the wavelength is much larger than the loop's radius in order to calculate the flux.
  • #1
wgdtelr
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Homework Statement


A plane EM wave in Vaccum is given by E = y Eo ei (kz-wt) with Eo = 1 V/m( real valued)
and wavelength λ= 10 m. A circular loop of radius a =1 m is located with its center at origin but Oriented so that a diameter lies along the z-axis while the plane of the loop makes an angle φ with y-axis.
Find the emf in the loop as a function of time and compute its maximum amplitude in Volts for optimal φ.





Homework Equations



The given EM wave in vacccum is E= y Eo exp i(kz-wt)

Hint: You can assume λ>>a to calculate the flux.

The Attempt at a Solution



At least give me an Idea on this how to approach this problem.. iam in need really..
 
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  • #2
I think, we should use the Faradays law of induction to solve this problem. It states that the induced emf in a loop is equal to the rate of change of magnetic flux through it. So, the magnetic field has to be calculated first and then the flux can be calculated and then the emf can be calculated using faraday's law. Is this the correct approach?
 

Related to Emf in a loop of radius a=1 as a function of time.

1. What is EMF in a loop of radius a=1 as a function of time?

The EMF (electromotive force) in a loop of radius a=1 as a function of time is a measure of the induced electric field in the loop. It is caused by a changing magnetic field, and its magnitude is directly proportional to the rate of change of the magnetic flux through the loop.

2. How is EMF in a loop affected by the loop radius?

The EMF in a loop is directly proportional to the loop radius. This means that as the loop radius increases, the induced electric field also increases. This relationship is governed by Faraday's law of induction.

3. What factors can affect the EMF in a loop of radius a=1 as a function of time?

Aside from loop radius, the EMF in a loop can also be affected by the strength and direction of the changing magnetic field, the number of turns in the loop, and the speed at which the magnetic field is changing. These factors can all influence the rate of change of magnetic flux and therefore affect the magnitude of the induced electric field.

4. How can the EMF in a loop of radius a=1 be calculated?

The EMF in a loop can be calculated using Faraday's law, which states that the induced EMF is equal to the negative rate of change of magnetic flux through the loop. This can be written as EMF = -dΦ/dt, where Φ represents the magnetic flux through the loop and t represents time.

5. Can the EMF in a loop of radius a=1 be negative?

Yes, the EMF in a loop can be negative if the magnetic flux through the loop is decreasing. This means that the induced electric field is in the opposite direction of the changing magnetic field. However, the magnitude of the EMF will still be positive, as it is determined by the rate of change of magnetic flux.

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