Conventional Current vs. Electron Flow Directions

Steps:

• Conventional current flows from the positive terminal of the power supply through the resistor to the negative terminal.
• This defines the direction in the resistor as from its positive-connected end to the negative-connected end.
• Free electrons, carrying negative charge, drift opposite to conventional current to complete the circuit.
• Thus, electrons flow from the negative-connected end of the resistor to the positive-connected end.

Why B is correct:

• It matches the definition: conventional current follows positive-to-negative (as if positive charges move), while electrons move negative-to-positive.

Why the others are wrong:

• A: Incorrectly reverses conventional current direction.
• C: Wrongly states conventional current from negative to positive, a common misconception.
• D: Falsely has electrons flowing same as conventional current, ignoring charge sign.

Final answer: B