What is the formula to calculate power?

What is the formula to calculate power?

• A. Power (W) = Energy (J) / Time (s)
• B. Power (W) = Energy (kWh) x Time (s)
• C. Power (W) = Energy (kJ) + Time (s)
• D. Power (W) = Energy (J) + Time (hr)

Answer: (A)

The formula to calculate power is derived from the relationship between energy and the time taken to use or convert that energy. Power is defined as the rate at which work is done or energy is transferred over time. The correct formula states that power in watts (W) is equal to the energy in joules (J) divided by the time in seconds (s). This indicates how much energy is transferred or converted per second, which is a fundamental concept in physics. The understanding of power as energy per time is crucial in various applications, from electrical devices to mechanical systems, enabling us to assess their efficiency and performance.

The formula to calculate power is derived from the relationship between energy and the time taken to use or convert that energy. Power is defined as the rate at which work is done or energy is transferred over time. The correct formula states that power in watts (W) is equal to the energy in joules (J) divided by the time in seconds (s). This indicates how much energy is transferred or converted per second, which is a fundamental concept in physics.

The understanding of power as energy per time is crucial in various applications, from electrical devices to mechanical systems, enabling us to assess their efficiency and performance.