# Questions tagged [electromagnetic-induction]

This tag is for questions regarding to electromagnetic induction, a process in which a conductor is put in a particular position and magnetic field keeps varying or magnetic field is stationary and a conductor is moving. Electromagnetic Induction was first discovered way back in the 1830’s by Michael Faraday.

1,218 questions
Filter by
Sorted by
Tagged with
20 views

### Can ionized air be used as a conductive medium for eddy brakes?

Sort of a conceptual engineering question, apologies if I am missing something, my background is in mechanical engr. Essentially, I was inspired by the classic experiment of dropping a magnet in a ...
18 views

### AC electromagnetic waves: interference and sensing technologies

When measuring the magnetic flux density around a current carrying wire it is possible to use a coil (with a ferrite for greater concentrations). These coils are "directionally sensitive" (...
10 views

### Does a constant magnetic field induce an emf in space irrespective of what is inside the space?

I came across a question which was a pyq from an Indian examination.The question states; An insulting rod of length L is falling with a velocity v perpendicular to B as well as perpendicular to L. ...
62 views

### Inductor connected to an AC source

Consider an inductor connected to an AC source, $V=V_0\sin\omega t$. Let the the switch in the circuit be closed at $t=0$. Then by Kirchoff's voltage law, $$V-L\frac{dI}{dt}=0$$ where $I$ is the ...
• 23
1 vote
28 views

### Intuition of Faraday's law at a boundary

I know that Faraday's law means that the tangential electric fields have to be equal at both sides of a boundary. I'm struggling to understand intuitively why this has to be the case. What would ...
• 11
22 views

### What effects do inductors have on circuits?

The above diagram is a simple circuit containing an inductor. According to the right hand grip rule, it can be deduced that the magnetic field is to the right. But the magnetic field produced by the ...
• 308
56 views

### What type of electric field is created by time varying magnetic field?

Example when an current carrying loop is placed in external magnetic field varying with time some emf is produced in the coil now we know that emf is due to electric field and the loop is experiencing ...
59 views

### Why $di/dt$ in inductor circuit reduces gradually after closing the switch?

When we close circuit having an inductor, an induced emf is generated across the inductor which opposes change in current through the circuit. This back emf depends on rate of change of current $di/dt$...
27 views

### Induced emf without flux change

In the picture below, the rectangular coil of wire is moving out of the page, so that only its upper part lies within the magnetic field. This movement creates motional emf in the upper side of the ...
• 15
1 vote
39 views

• 115
50 views

### Have there been any experiments in which the Earth's electromagnetic field was used to do work?

Simply speaking using faraday's law to generate electricity with the use of earth's magnetic field. I'm not talking about some revolutionary new way of generating electricity that would end our energy ...
• 111
Background Faraday's law of induction gives a quantitive formula for the induced emf in a loop with changing magnetic influx through it: $$\epsilon =-\frac{d\Phi_B}{dt}$$ Although this law is entirely ...