Question

Imagine a current carrying wire with the direction of current downward or into the page. The direction of magnetic field lines is __________.

• A. clockwise
• B. anti-clockwise
• C. into the page
• D. out of the page

Answer 1

The correct option is A clockwise

Direction of magnetic field lines due to a straight current carrying conductor can be found from right hand palm rule such that the direction of thumb points in the direction of current and the palm points in the direction of magnetic field lines.
By using this, we find the magnetic field lines to be clockwise.