Question

A current is passed through a straight wire. Then the shape of lines of forces established around it is ?

• A. Circular
• B. Oval in shape
• C. Straight lines
• D. All of the above

Answer 1

The correct option is A

Circular

According to the right-hand thumb rule, if one is holding a current carrying conductor in his/her right hand such that the thumb points towards the direction of current, then the fingers will be wrapped around the conductor in the direction of the field lines of the magnetic field. These lines will be circular.