All Questions
12
questions
1
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2
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94
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With induced voltage, what is the electric potential difference?
Lets say we have a closed circular loop of wire in a constant magnetic field in the (-z) direction. If I suddenly make the circular loop smaller (meaning a smaller surface area), I will induce a ...
- 11
1
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1
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163
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Calculating Induced EMF in Wireless LED Circuit
I have built the following circuit to power a wireless LED and my calculations and measurements do not give the same values. I am measuring a voltage nearly 6 times larger than I would expect in my ...
- 113
0
votes
3
answers
110
views
Metal/good conductor frame in a changing magnetic field
Imagine that we put a metal/good conductor frame into a changing magnetic field. Due to the fact that this is an electromagnetic induction phenomenon, an induced EMF can be measured between the two ...
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1
vote
5
answers
578
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Induced voltage as a difference of potentials on a ring
If you put a ring (Picture 1) of wire into changing magnetic field, the process called magnetic induction creates induced voltage. Voltage is by definition (Definition 2) the difference in electric ...
1
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3
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1k
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What does direction of EMF mean?
In faraday's law it mention's direction of EMF( like in closed loopit is clockwise or anticlockwise depending on direction of motion of magnet) but defination of EMF is roughly Potential diffrence ...
user233089
2
votes
2
answers
17k
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How doI find the average induced emf in a coil given the rate of change of flux density, and the area of the coil?
The magnetic flux density changes from +10 T to -10T in 5 seconds. The area of the coil is 2.5 m^2. What is the average emf induced?
By Faraday's law, this will be equal to the change in magnetic ...
- 254
1
vote
1
answer
875
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Why is there an emf induced across the width of a metal sheet when it is moved across a uniform magnetic field?
By Faraday's law, the flux is constant, so there will be no emf. But each electron in the metal sheet is moved at some speed, so it will experience a force, and as a result, electrons will accumulate ...
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1
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1
answer
985
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The 2 Forces on the Conductor having induced Motional EMF
Ok, a conductor PQ is placed on a U-shaped conducting rails situated in a magnetic field, B directed inside the plane of paper.
When it is moved to left with velocity ,v, the free electrons will ...
- 356
0
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0
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58
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Modeling the working of a transformer by pushing magnet into a coil
Let me go step-by-step.
First I will outline a simple transformer. There are two circuits next to each other (not touching). One is an electromagnet set-up (with AC supply) and the other has a ...
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1
vote
4
answers
819
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What happens if I have a square conducting wire being permeated by a magnetic field and the field suddenly disappears?
Suppose there is a square conducting wire in a magnetic field. The two vertical branches will have the same emf, and the two horizontal branches will have 0 emf, resulting in a net emf of zero and ...
- 291
0
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1
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53
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Average induction voltage
I've got a basic question on the method of computing the average induction voltage.
Here is the task:
A conductor loop with the area $A_1 = 50\text{cm}^2$ in a magnetic field with the flux density of ...
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