Which finger shows the direction of current in Fleming's left hand rule?

Fleming’s Left-Hand Rule is used to determine the direction of force, magnetic field, and current in a conductor carrying current in a magnetic field.

According to this rule, if you stretch the thumb, index finger, and middle finger of your left hand mutually perpendicular to each other:

• The Index finger represents the direction of the magnetic field (B).

• The Middle finger represents the direction of the current (I).

• The Thumb represents the direction of the force or motion (F) acting on the conductor.

Thus, in Fleming’s Left-Hand Rule, the middle finger shows the direction of current in the conductor.

Therefore, the correct answer is Option B: Middle finger.