Question

what is the si unit used to measure power?
watt.
meter.
joule.
newton.
second.

Explanation:

To determine the SI unit of power, we analyze each option:

• Watt: Defined as joule per second ($\text{W} = \frac{\text{J}}{\text{s}}$), it measures power (rate of energy transfer).
• Meter: SI unit of length, not power.
• Joule: SI unit of energy/work, not power.
• Newton: SI unit of force, not power.
• Second: SI unit of time, not power.

Thus, the watt is the SI unit for power.

Answer:

A. watt