What Are the Uses and Limitations of Electromagnets?

  • Thread starter Thread starter Bez
  • Start date Start date
  • Tags Tags
    Electromagnet
AI Thread Summary
Electromagnets are coils of wire that generate a magnetic field when an electric current passes through them. They are widely used in applications such as electric motors, generators, and magnetic levitation systems to generate electricity and control mechanical movement. During electromagnetism, the interaction between electric currents and magnetic fields occurs, enabling various technologies. Advantages of electromagnets include their ability to be turned on and off and their adjustable strength, while disadvantages include heat generation and reliance on a power source. Future developments may focus on improving efficiency and miniaturization for advanced applications.
Bez
Messages
14
Reaction score
0
It would be great if someone is able to answer the following question (if possible)
What is electromagnet?
How is electromagnet used to generate electricity?
What happens during electromagnetism?
Advantages and disadvantages of using electromagnets.
Future developments in electromagnetism.
Thanks in advance. :)
 
Physics news on Phys.org
What do you think the answers are to these? What do you feel electromagnetism is from your knowledge through research?
 
does it help in creating electricity?
 
TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
Thread 'Variable mass system : water sprayed into a moving container'
Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
Back
Top