Question

Complete the following statements with an appropriate word / term to be filled in the blank space(s).

The magnetic field lines around a current-carrying wire consist of a series of concentric circles whose direction is given by the _________.

• A. Fleming's right hand rule
• B. Fleming's left-hand rule
• C. Right hand thumb rule
• D. None of these

Answer 1

The correct option is C Right hand thumb rule

The magnetic field lines about a current-carrying wire consist of a series of concentric circles whose direction is given by the right hand thumb rule.
According to the rule, when you wrap your right hand around the current carrying wire with your thumb in the direction of current, the fingers represent the direction of magnetic field.