Questions tagged [faradays-law]
The faradays-law tag has no summary.
32 questions
4
votes
2
answers
361
views
Induced EMF due to mag field
When a closed circular loop is placed in a magnetic field varying uniformly with time due to change in magnetic flux EMF is induced in the loop. However between what points can that potential ...
- 53
0
votes
1
answer
119
views
Induced EMF in a stationary coil
Suppose a there is a coil which hasvelocity=0 and we can say it does not experience any force due to themagnetic field. There is no role of induced EMF in any case. If we place a stationary coil and ...
- 119
0
votes
2
answers
104
views
How basic wireless electricity transmission circuit works?
In the circuit below because of the DC voltage source there will be no flux change on steady state of the circuit so how the LED still stays turned on if magnetic flux is not changing and no ...
- 137
0
votes
3
answers
107
views
Noise Voltage from Sinusoidal Flux Density Derivation
From page 52 of Electromagnetic Compatibility Engineering by Henry Ott; How was the imaginary and omega component in eq. 2-12 derived from eq. 2-11? And how did the negative sign disappear?
0
votes
1
answer
121
views
Example problem of induced emf in a coil travelling with some velocity and perpendicular to the earth's magnetic field
I have a example problem which I created myself just out of curiosity,
Question:
Let's say a copper wire coil(20mm dimeter(r=10mm)) of 3 turns(N=3) is moving along the surface(Note-coil is not ...
- 85
5
votes
2
answers
791
views
Why are induction motor cores laminated to prevent eddy currents?
The permeable iron alloy cores of induction motor rotors are formed from thin laminated sheets, designed to prevent eddy current flow and thus "reduce losses", but isn't the whole point of ...
- 525
0
votes
0
answers
65
views
Faraday’s Law and voltage balance
Does anyone know how to use Faraday’s Law and voltage balance to explain this equation?
I don't understand where jw comes from.
- 595
1
vote
2
answers
178
views
Analysing the behaviour of inductor in the circuit
Suppose we have an L circuit with DC power supply of emf \$\mathscr{E}\$
simulate this circuit – Schematic created using CircuitLab
By KVL,
\$\mathscr{E}=L\frac{dI}{dt}\$.
This suggests that \$\...
- 85
1
vote
1
answer
264
views
How to find the points between which EMF is induced in a loop with resistors?
I recently came across a problem on Faraday's law, which had multiple resistors. The circuit looked something like this, with the loop rotating clockwise.
Personally, I felt that there would be three ...
- 235
-1
votes
2
answers
318
views
Does the direction of coil winding impact the direction of induced voltage?
I have taken and modified a bit the following image from a similar question, where it was explained that the direction of the coil winding does not impact the direction of the current: Does coil ...
- 163
0
votes
1
answer
1k
views
Induced voltage in loop around wire in home AC circuit
I have an electric patio heater that has no indication of whether it's on or off. I want to wrap a loop of wire around its power cord, the goal being to induce a current that can power an LED to tell ...
- 103
1
vote
1
answer
878
views
How can the induced voltage be proportional to the frequency?
According to Faraday's Law, in coupled inductors, the magnitude of the induced voltage at the secondary coil is proportional to primary power source's frequency (V2 = w x I1 x M).
On the other hand, ...
- 41
4
votes
1
answer
1k
views
What is the EMF induced between two points in a closed wire loop?
Farday's law says if I change the magnetic flux through a closed loop an emf would appear.
Between what two points is the EMF calculated?
Let's say that my calculations give me an E=−dΦdt=10V.
What ...
- 153
1
vote
3
answers
1k
views
Constant Voltage Applied to Inductor
I'm seeking clarity on understanding what happens when a constant voltage is applied to an inductor. I gave this explanation in another thread and it was regarded as wholly misguided in the following ...
- 11
1
vote
1
answer
106
views
What is the current induced in a wire connected to an ideal transformer using Faraday's law?
Imagine an ideal transformer interfacing an ideal current source with a ramp function \$i_1(t)=a t\$ connected to the primary winding and a resistor \$R\$ connected to the second winding. We want to ...
