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What is the unit of electric power?
Joule
Watt
Volt
Ampere
Watt
The SI unit of electric power is the Watt (W), which is defined as one joule of energy transferred or consumed per second. Electric power measures the rate at which electrical energy is converted into other forms of energy, such as heat, light, or mechanical work.
The SI unit of electric power is the Watt (W), which is defined as one joule of energy transferred or consumed per second. Electric power measures the rate at which electrical energy is converted into other forms of energy, such as heat, light, or mechanical work.
Think of electric power like the rate at which water flows through a pipe from a tank; a higher watt rating means more energy is being used or delivered per second, similar to a high-capacity water pump.
P = VI (Power is Very Important)
P=VimesI тАФ Electric power in terms of voltage (V) and current (I)
P=I2imesR тАФ Electric power in terms of current (I) and resistance (R)
Electric power in a direct current circuit is calculated as the product of potential difference (voltage) and electric current. According to Joule's law and Ohm's law, power can also be expressed in terms of resistance and current or voltage.
The SI unit of electric power is the Watt (W).
One Watt is equivalent to one Joule per second (1┬аW=1┬аJ/s).
Commercial electrical energy is often measured in kilowatt-hours (kWh).
Standardized international unit facilitating global scientific and engineering calculations.
Rating electrical appliances such as bulbs, heaters, and motors.
Calculating household and industrial electricity consumption.
Option A (Joule) is the SI unit of energy or work, not power.
Option C (Volt) is the unit of electric potential difference.
Option D (Ampere) is the SI unit of electric current.
B is correct тАФ The SI unit of electric power is the Watt, representing the rate of energy transfer per unit time.
Always remember the dimensional distinction between energy (Joule) and power (Watt = Joule/second), as exam questions frequently test this conversion.
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