Question

An electric fan runs from the \[V=230\,V\] mains. The current flowing through it is \[0.4\,A\]. At what rate electrical energy is transferred by the fan?

Answer 1

Hint:The above problem can be solved by using the formula of consumption of power by an electrical device in terms of current and voltage across it.Electric power is the rate at which electrical energy is transferred by an electric circuit per unit of time. The watt is the SI unit of power, equal to one joule per second.

Complete step by step answer:
Electric power is a physics term that describes the rate of electrical energy transfer by an electric circuit per unit of time. The watt, denoted by P and measured in the SI unit of power, is one joule per second. Electricity is typically supplied by sources such as electric batteries and generated by electric generators.The formula for electric power is given by,
\[P=VI\]
In which, the letter \[P\] stands for power, the potential difference in the circuit is denoted by \[V\] and \[I\] denotes the electric current.
Given, \[V=230\,V\] and \[I=0.4\,A\]
So, using formula
\[P=VI\]
\[\Rightarrow P=230\times 0.4\]
\[\therefore P=92\,J/s\].

Thus, the rate of electrical energy transferred by the fan is \[92\,J/s\].

Note:Electric power generated at central power plants and distributed via an electrical transmission grid is widely used in industrial, commercial, and consumer applications. A country's per capita electric power consumption correlates with its industrial development. Formalized paraphrase Electric motors are used to power manufacturing machinery as well as to propel subways and railway trains. Electric lighting is the most important form of artificial light.