Example 13.1 - Chapter 13 Class 10 - Magnetic Effects of Electric Current

A current through a horizontal power line flows in east to west direction. What is the direction of magnetic field at a point directly below it and at a point directly above it?

Answer

To find Magnetic Field, we will use the Right Hand Thumb Rule.

Now,

• Since current flows from East to West, pointing out thumb towards West
• If we curl our fingers, that will show direction of magnetic field

So, for a point directly above wire, magnetic field is into the paper

and for a point directly below wire, magnetic field is out of the paper