Electromagnetic induction near a generator

Click For Summary
SUMMARY

This discussion centers on the principles of electromagnetic induction in relation to generators. A high school student inquires about inducing current in a wire coil placed near a generator, specifically during fluctuations in the magnetic field. While it is theoretically possible to induce current, well-designed generators and transformers utilize iron cores to minimize stray magnetic fields, rendering them largely ineffective for practical use. For practical applications, connecting an LED to a small motor powered by a battery is suggested as a viable method to demonstrate electromagnetic induction.

PREREQUISITES
  • Understanding of electromagnetic induction principles
  • Familiarity with generator and transformer design
  • Basic knowledge of electrical circuits
  • Experience with connecting LEDs and small motors
NEXT STEPS
  • Research the design and function of iron cores in transformers
  • Learn about the relationship between rotation speed and induced current
  • Explore practical experiments with electromagnetic induction using coils
  • Investigate the specifications for connecting LEDs to small motors
USEFUL FOR

This discussion is beneficial for high school students studying physics, educators teaching electromagnetic concepts, hobbyists interested in electrical experiments, and anyone exploring practical applications of electromagnetic induction.

silvercrow
Messages
23
Reaction score
0
Hi , i am a high school student ( class 10 ) and after reading about electromagnetic induction iwas thinking about what if u place a wire coil connected to a circuit in the magnetic field / near a generator ? Because electricity is turned of for a fraction of a second there will be great variation of magnetic field which would induce current in the coil ? Am i incorrect ?
 
Physics news on Phys.org
Yes, in principle. However, well-designed generators and transformers use iron cores to guide magnetic fields lines for maximum efficiency so that the stray magnetic field is very small and not really usable. It may be measureable, though.

http://en.wikipedia.org/wiki/Magnetic_core
 
M Quack said:
Yes, in principle. However, well-designed generators and transformers use iron cores to guide magnetic fields lines for maximum efficiency so that the stray magnetic field is very small and not really usable. It may be measureable, though.

http://en.wikipedia.org/wiki/Magnetic_core

oo thanks buddy but tell me how much rotation speed of magnets i need to induce a small amount of current like lighting a really small bulb ?
 
Connect an LED to a small motor from a battery powered toy.
 

Similar threads

High School Antenna induction, oscillating circuit generating EM Waves
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad How induction works within a coil (nuances of it)
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad How Do Time-Varying Currents in Conductors Generate EM Fields and Waves?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate An Interesting Question on Faraday's Law of Electromagnetic Induction
  • · Replies 11 ·
Replies
11
Views
3K
Undergrad Need a good idea : 3D simulation of Inductive wireless power transfer
  • · Replies 6 ·
Replies
6
Views
2K
Graduate Is there a difference between Faraday’s induction experiments?
  • · Replies 23 ·
Replies
23
Views
2K
Undergrad Mutual inductance in a transformer
  • · Replies 16 ·
Replies
16
Views
4K
Undergrad What is the origin of Lorenz force?
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad DIY Electromagnetic Induction Experiment
  • · Replies 2 ·
Replies
2
Views
3K
Undergrad Can a One Direction Transformer Prevent Reverse Induction in Primary Coil?
  • · Replies 21 ·
Replies
21
Views
2K