Producing a Magnetic Field: What You Need to Know

AI Thread Summary
A magnetic field can be produced by an electrical current or a time-varying electric field. These two methods are fundamental in generating magnetic fields in various applications. Understanding these principles is essential for fields such as electromagnetism and electrical engineering. The discussion emphasizes the simplicity of producing magnetic fields through these means. Knowledge of these concepts is crucial for further exploration in physics and engineering.
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1 short question: how can a magnetic field be produced?
 
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1 short answer: A magnetic field can be produced by either an electrical current or a time varying electric field.
 
Tide said:
1 short answer: A magnetic field can be produced by either an electrical current or a time varying electric field.


thanks..a..lot! :smile:
 

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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...
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