What kind of work does the electric current do in the electric motor of the vacuum cleaner in 0.5 hours of operation

What kind of work does the electric current do in the electric motor of the vacuum cleaner in 0.5 hours of operation, if it is connected to a 220 V network, and the current strength is 5A.

Given:

t = 0.5 h (translated into SI) = 1800 seconds;

U = 220 V;

I = 5 A.

Find:

A -?

Solution:

To find the amount of work done, let’s use the formula: A = I² * R * t;

Find the resistance: R = U / I = 220/5 = 44 Ohm;

A = 5² * 44 * 1800 = 1980000 J;

Answer: the electric current does work at 1,980,000 J.