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### 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 ...
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416 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 ...
53 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.
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1 vote
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1 vote
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### Steel cooker is not a Faraday cage? [closed]

I read that steel/iron/metal/conducting cages, with gaps less than the wavelength of electro magnetic waves, shield whatever is inside from that radiation. But when I put my mobile inside a cooker and ...
1k views

### Maxwells Equation in Time varying field

The Maxwells Equation giving the value of Magnetic field (B) for stationary and moving coils are having different variables. How is the third equation possible with such 2 cases?
878 views

### If the self-induced EMF in an inductor is 180° out of phase with source voltage, shouldn't they cancel out and net voltage should become zero?

I know that inductor opposes the change in magnetic flux linked with it. In case of an ac sinusoidal voltage applied across a pure inductor, the emf induced across the inductor is equal and opposite ...
1 vote
99 views

### Why is lenz law not applied in this crcuit analysis

So in this circuit, initially the current and voltage is 0. At t = 0 the voltage snaps to V. Now my analysis is: According to Lenz Law the voltage developed will ...
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453 views

### How do we reduce or nullify the back current from the wheel motors of the modern electric vehicles?

As expected, this EMF opposes the voltage of the source that created it; that is, the motor becomes a generator as soon as it is turned on, and the opposing (or counter, or back) EMF will increase ...
1 vote
199 views

### Confusion between Faraday's law and Kirchoff's circuit law

Consider a voltage source V connected to a coil. By Faraday's Law e=-(dƛ/dt). I don't understand the direction of the induced voltage e making v=-e However, if we treat the coil as a circuit element ...
1 vote
168 views

### Faraday cage and static electric field

Can anyone explain - what is the difference between static and varying electro-magnetic fields? I know the definition for what is static electric field. It does not change with time (0Hz frequency.) ...
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1 vote