CBSE Class 7 Answered
When we pass electric current through iron nail why does it becomes an electromagnet? What happens to it?
Asked by rinipadhi1975 | 03 Feb, 2016, 08:28: PM
Expert Answer
Iron nail is a good conductor of electricity.
Now, when a charge flows through a conductor, it generates a magnetic field around the conductor.
This phenomenon is called magnetic effect of electric current. Nothing extraordinary happens inside a conductor, but only an effect is produced around it.
Therefore, when current is passed through an iron nail, a magnetic field is generated around it and it acts like an electromagnet.
When the current is stopped, the magnetic field is switched off.
Answered by Romal Bhansali | 04 Feb, 2016, 10:57: AM
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