Does a Stationary Electromagnet Induce EMF in a Surrounding Coil?

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SUMMARY

The discussion centers on whether a stationary electromagnet induces an electromotive force (EMF) in a surrounding coil. It is established that a moving electromagnet generates an EMF due to a change in magnetic flux, as described by the equation Voltage generated = -NΔ(BA)/Δ(t). However, a stationary electromagnet does not create an EMF in the surrounding coil, as there is no change in magnetic flux over time. The participant's experiments with resistors highlight the importance of understanding circuit behavior when applying voltage to coils.

PREREQUISITES
  • Understanding of electromagnetic induction principles
  • Familiarity with solenoids and their operation
  • Knowledge of Ohm's Law and circuit components
  • Basic grasp of magnetic flux and its calculation
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  • Learn about the behavior of solenoids in static and dynamic conditions
  • Explore the effects of resistance in electrical circuits
  • Investigate the use of galvanometers in measuring EMF
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Homework Statement



Hooking up voltage to a solenoid (coil of wire) creates an electromagnet. Moving the electromagnet in and out of a larger coil hooked up to a galvanometer creates an emf (voltage) in the larger current.

Does an emf get created for a *stationary* electromagnet inside a larger coil of wire?

Homework Equations



Voltage generated = -N\frac{\Delta(BA)}{\Delta(t)}

The Attempt at a Solution



My attempt at the solution included burning 3 resistors. I hooked up 6VDC to a 10 ohm resistor in series with the smaller coil (electromagnet). Before I could count to five, the resistor was glowing hot. I increased the resistor to 27 ohms and the same thing happened (twice).

So, afraid of getting kicked by my professor, I wasn't able to directly see what was happening with a stationary electromagnetic coil inside the larger solenoid. Should the galvanometer's needle move when the electromagnet is stationary and not moving?
 
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JJBladester said:

Homework Statement



Hooking up voltage to a solenoid (coil of wire) creates an electromagnet. Moving the electromagnet in and out of a larger coil hooked up to a galvanometer creates an emf (voltage) in the larger current.

Does an emf get created for a *stationary* electromagnet inside a larger coil of wire?

Homework Equations



Voltage generated = -N\frac{\Delta(BA)}{\Delta(t)}

The Attempt at a Solution



My attempt at the solution included burning 3 resistors. I hooked up 6VDC to a 10 ohm resistor in series with the smaller coil (electromagnet). Before I could count to five, the resistor was glowing hot. I increased the resistor to 27 ohms and the same thing happened (twice).

So, afraid of getting kicked by my professor, I wasn't able to directly see what was happening with a stationary electromagnetic coil inside the larger solenoid. Should the galvanometer's needle move when the electromagnet is stationary and not moving?

Could you predict what will happen with the equation you wrote down?
 

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