Which rule is used to find direction of magnetic field around current carrying conductors?(a) Right Hand Thumb Rule(b) Left Hand Thumb Rule(c) Fleming's Right Hand Rule(d) Fleming's Left Hand Rule

The correct rule used to find the direction of the magnetic field around a current-carrying conductor is:
(a) Right Hand Thumb Rule
Explanation:
The Right Hand Thumb Rule states that if you hold a current-carrying conductor with your right hand in such a way that your thumb points in the direction of the current, then your fingers will curl around the conductor in the direction of the magnetic field lines.
This rule helps in determining the direction of the magnetic field generated by a straight current-carrying conductor.
Other options:
• (b) Left Hand Thumb Rule: This rule is typically used to find the direction of force on a current-carrying conductor placed in a magnetic field, not for determining the direction of the magnetic field.
• (c) Fleming's Right Hand Rule: This rule is used to find the direction of induced current in a conductor moving through a magnetic field, not for finding the direction of the magnetic field around a current-carrying conductor.
• (d) Fleming's Left Hand Rule: This rule is used to find the direction of force on a current-carrying conductor in a magnetic field, not for determining the direction of the magnetic field.
Thus, the correct answer is (a) Right Hand Thumb Rule.