Question on Electromagnatic Induction

  • Thread starter mike2011
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    Induction
In summary, the key elements for a successful home-made electromagnetic induction are: using a ferromagnetic material for the core (such as iron or steel), ensuring the wire is insulated and making proper electrical connections at the battery and switch terminals.
  • #1
mike2011
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Homework Statement


9 volt battery
1 Nail
Few paper clips
Cooper Wire
Switch

Homework Equations


Why my Electromagnetic Induction experiment failed ? It did not create electromagnetic field to attract surrounding paper clips. What are missing here ? How to do successful home-made electromagnetic Induction ? Please help.

The Attempt at a Solution


Made 75 rounds around the Nail to create Solenoid.
Wire connected to battery + -
Turned on the switch
 
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  • #2
mike2011 said:

Homework Statement


9 volt battery
1 Nail
Few paper clips
Cooper Wire
Switch

Homework Equations


Why my Electromagnetic Induction experiment failed ? It did not create electromagnetic field to attract surrounding paper clips. What are missing here ? How to do successful home-made electromagnetic Induction ? Please help.


The Attempt at a Solution


Made 75 rounds around the Nail to create Solenoid.
Wire connected to battery + -
Turned on the switch
Was the wire insulated ?
 
  • #3
Hello mike2011,

Welcome to Physics Forums! :smile:

mike2011 said:

Homework Statement


9 volt battery
1 Nail
Few paper clips
Cooper Wire
Switch

Homework Equations


Why my Electromagnetic Induction experiment failed ? It did not create electromagnetic field to attract surrounding paper clips. What are missing here ? How to do successful home-made electromagnetic Induction ? Please help.

The Attempt at a Solution


Made 75 rounds around the Nail to create Solenoid.
Wire connected to battery + -
Turned on the switch

If you are using your own nail (rather than one provided for you), make sure the nail is iron or steel based and not aluminum. Aluminum nails will not work for this experiment (you need a ferromagnetic material as the electromagnet core. Aluminum is not a ferromagnetic material).

[Edit: you can check this using a standing magnet, like a refrigerator magnet. If the nail is attracted to the magnet it should work. If it is not attracted to the magnet, it's probably an aluminum nail.]

The copper wire needs to be insulated for the part that wraps around the nail. If the wire is not insulated it will just create a short circuit and nothing will happen, except it might get very hot.

The insulation needs to be stripped off the wire at the parts that connect to the battery-terminals and switch terminals. Electrical contact needs to be made at these parts of the wire.
 

1. What is electromagnetic induction?

Electromagnetic induction is the process by which a changing magnetic field induces an electric current in a conductor. This phenomenon was first discovered by Michael Faraday in the 1830s.

2. How does electromagnetic induction work?

Electromagnetic induction works by using a magnetic field to induce an electric current in a conductor. This can be achieved by moving a magnet near a conductor, or by changing the strength of the magnetic field near the conductor.

3. What are the applications of electromagnetic induction?

Electromagnetic induction has numerous applications in various industries, including power generation, electric motors, transformers, and wireless charging. It is also used in devices such as generators, alternators, and induction cooktops.

4. What is Faraday's law of electromagnetic induction?

Faraday's law of electromagnetic induction states that the magnitude of the induced electromotive force in a closed circuit is equal to the rate of change of the magnetic flux through the circuit. In simpler terms, it means that the strength of the induced current is directly proportional to the rate of change of the magnetic field.

5. What is Lenz's law in electromagnetic induction?

Lenz's law states that the direction of the induced current in a conductor will always be such that it opposes the change that caused it. This means that the induced current will always flow in a direction that creates a magnetic field that opposes the original changing magnetic field.

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