Power is defined as

Power is defined as

• A. The energy per unit charge
• B. The rate of energy transfer
• C. The energy stored in a circuit
• D. The energy measured in joules

Answer: (B)

Power is the rate at which energy is transferred or transformed in a circuit. In electrical terms, it tells you how quickly electrical energy is delivered from the source and converted into other forms like light, heat, or motion. The unit is the watt, which equals one joule per second. So a device using energy at 60 joules each second has a power of 60 watts. Why the other ideas don’t fit: energy per unit charge describes voltage, not how fast energy is moved. The energy stored in a circuit refers to an amount of energy already stored, not how fast it is being transferred. Joules are a unit of energy, not a rate, so they describe how much energy, not how quickly it is delivered.

Power is the rate at which energy is transferred or transformed in a circuit. In electrical terms, it tells you how quickly electrical energy is delivered from the source and converted into other forms like light, heat, or motion. The unit is the watt, which equals one joule per second. So a device using energy at 60 joules each second has a power of 60 watts.

Why the other ideas don’t fit: energy per unit charge describes voltage, not how fast energy is moved. The energy stored in a circuit refers to an amount of energy already stored, not how fast it is being transferred. Joules are a unit of energy, not a rate, so they describe how much energy, not how quickly it is delivered.