Charge Times Voltage Equals Energy

Steps:

• Recall that electric potential difference (voltage, V) is work done per unit charge.
• The work done to move charge q through potential difference V is W = qV.
• This work represents energy transferred to or from the charge.
• Thus, the product qV gives energy transferred, not other quantities.

Why B is correct:

• By definition, electrical energy transferred (or work) is E = qV, where q is charge and V is potential difference.

Why the others are wrong:

• A: Current is charge flow rate, I = q/t, not qV.
• C: Power is energy per time, P = qV/t, not qV.
• D: Resistance relates voltage and current via V = IR, not directly qV.

Final answer: B