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.
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Length of helix in one time period [closed]
How to find the length of a helix in one time period?
In the case of a particle suspended at the origin and a magnetic field along the $y$ axis we know that the time period will be equal to $2\pi/aB$ ...
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Straight wire in moving uniform magnetic field induced emf
My question is a follow-up to this one.
The green dotted line is the arbitrary loop which is constructed in the calculation of emf in the wire of length L. x is a variable which can be changed to ...
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Can a satellite generate electricity by using a planet's magnetic field? [duplicate]
I am entering AP Physics E&M and don't have much knowledge about electricity but always had an idea based on my limited knowledge.
If a satellite had a metal coil inside of it, wouldn't it have an ...
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What happen when a circular coil (not a rod) is moving in a uniform magnetic field that is perpendicular to the velocity with which it is moving? [closed]
B is perpendicular to v
Conductor is in circular shape which is moving with v velocity in the Uniform magnetic field B
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Faraday's and Kirchoff's in RL circuits
I know this question has probably been asked a 100 times over on this site and there is a whole controversy on it but I still don't understand the explanations and had to ask it again. First of all I ...
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Growth of Current in an Inductor Connected Across a Battery [duplicate]
When baterry is connected across inductor with no resistance in circuit, won't the current flowing through it be zero, as inductor back emf will counteract the effect of potential difference due to ...
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Cannot catch a minus sign mistake when deriving the ODE for an LC circuit
It's probably a very basic question but I just cannot wrap my mind around it. I'll just try to derive the differential equation for an LC circuit:
According to the law of induction, in a solenoid we ...
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Effect of catapult field on the weight of magnets
Diagram shows a metal rod, PQ placed perpendicularly to two permanent magnets and connected to an electric circuit. The steel core containing the two magnets is placed on an electronic balance. What ...
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Why is induced EMF in DC motor being included in Kirchoff's Loop Rule
I was reading some lecture notes (don't think I can include them here) that show the EMF induced in the armature of a DC motor, being included in the equation of Kirchoff's Voltage Law for the ...
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When a current passes through the secondary of an ideal transformer, KVL is violated in th primary?
When an ideal transformer is on the no load condition, the primary circuit is just a normal AC source connected to an inductor. In other words, the voltage across the inductors equals the source ...
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Internally, what defines whether a material is magnetically hard or soft?
I know that magnetically hard materials hold magnetic fields (magnetic moment alignment) for longer, while soft metals do not. However, what, internally, causes these properties to arise?
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Which magnetic field is the one in the inductance equation?
Any self induction problem that can be solved via $emf=-N\frac{\Delta \phi}{\Delta t}$ should be equivalently solvable via $-L\frac{\Delta i}{\Delta t}$. What if the coil is already existing in a ...
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Voltage measured by a Volt meter on a coil
This question is asked on the 2002 Canadian Association of Physicists Prize Exam:
By all logic, the voltage across an inductor in a circuit should be the same as the induced EMF. Or, if there is also ...
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Confused between induced emfs
We know when flux of B changes an EMF is induced in loop
And also when a rod moves in mag field Potential difference between its ends is also produced.
So is this ques while writing Potential equation
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Self-inductance of $N$ turns coil to current loop [duplicate]
I saw nice problem, that tricked my mind. The system is:
Given that the coil has self-inductance of $L$, with diameter $D$ and $N$ turns. Now we take the coil, and open the turns to form single loop. ...
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