Question

1. what unit do we use to describe the power of a certain device (like light bulbs or tvs)?

watts
amps
volts
kilowatt - hours
1 point
clear selection

Explanation:

To determine the unit for the power of devices (like light bulbs or TVs), we analyze each option:

• Watts: The SI unit of power, measuring the rate of energy transfer. Devices’ power (e.g., a 60 - watt bulb) is described in watts.
• Amps (Amperes): Measure electric current (flow of charge), not power.
• Volts: Measure electric potential difference (voltage), not power.
• Kilowatt - hours: Measure energy (total power used over time), not instantaneous power.

Thus, watts are used for device power.

Answer:

A. Watts