A current carrying wire is placed horizontally in a magnetic field with north pole in upward and south pole in downward direction. The wire is deflected towards south direction. The direction of electrons in the wire is:

Correct option is A

Correct Answer: A

Explanation:

• According to Fleming's Left-Hand Rule, if the forefinger points in the direction of the magnetic field (North to South) and the thumb points in the direction of the force (Southward deflection), the middle finger indicates the direction of conventional current.
• In this scenario, the magnetic field acts downward (North is up, South is down). The force/deflection is toward the South (horizontal plane). Aligning the hand shows the conventional current flows from East to West.
• Since electrons are negatively charged, they flow in the opposite direction to conventional current. Therefore, the direction of electrons is from West to East.

  

  
  

Information Booster:

• Fleming's Left-Hand Rule: This rule is a simple way to find the direction of force acting on a current-carrying conductor in a magnetic field. The thumb represents Force (Motion), the Forefinger represents Magnetic Field, and the Middle finger represents Current (F-B-I).
• Electron Flow vs. Conventional Current: By convention, current direction is taken as the direction of flow of positive charges. Electrons, being negative, always drift in the direction opposite to this conventional current.