# Tag Info

Accepted

### Is Farady's law valid for conducting loop only?

Faraday's law is for a mathematical loop, even with nothing there.
• 1,104

### Can the induced voltage in an inductor coil reverse the direction of curent?

You can't assume the current will increase at a rate of $2\text{ A/s}$ to find the induced emf because the inductor voltage (or alternatively, the induced emf) will oppose the current flow, and ...
• 7,257
1 vote
Accepted

### Would a ring magnet around a copper tube be slowed?

In a word, yes. Eddy currents are induced in conductors exposed to changing magnetic fields. Those currents specifically counter the change in magnetic flux the conductor is experiencing. That's Lentz'...
• 282
1 vote

### Is Farady's law valid for conducting loop only?

You can apply Faradays law for any loop as long as it is complete
1 vote

### Inductance in AC circuit

Why does an inductor oppose a change in current and not voltage? You have got already some good answers. Here is yet another intuitive way to understand it. The magnetic field energy carried by the ...
• 25.7k
1 vote
Accepted

### Inductance in AC circuit

Why does an inductor oppose a change in current and not voltage? Because induced electric field (which causes induced EMF) is associated with changing current (accelerated motion of electric charges),...
• 27.8k
1 vote

### Inductance in AC circuit

In a simple circuit where there is a changing voltage source with an inductance and a resistance in series, the same current flows through every device, so it is clear to say that the back emf opposes ...
• 996
1 vote

### Why is the equation of the induced current in the secondary coil in a transformer true?

In an ideal transformer in which no current is being drawn from the secondary, the current in the primary is determined by the inductive reactance of the primary and is out of phase with the voltage, ...
• 11.4k
1 vote

### How long of a wire do i need to construct a solenoid of $N$ turns?

aaand i am stuck here, i will maybe need to put into an integral, but not sure how yet, i will try and update if i come any further. some pointers/comments/feedback would be appreciated You need to ...
• 6,956

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