Find the average magnitude of the induced emf if the change in shape occurs in 0.125 ss and the local 0.504-TT magnetic field is perpendicular to the plane of the loop.

Complete Question

An emf is induced in a conducting loop of wire 1.12m long as its shape is.

changed from square to circular. Find the average magnitude of the induced emf if the change in shape occurs in 0.125 ss and the local 0.504-TT magnetic field is perpendicular to the plane of the loop.

The induced emf is  

Explanation:

From the question we are told that

      The  time taken is  

       The magnitude of the magnetic field is  B =  0.504 T

        The length of the loop wire is  

Generally the circumference of the wire when in circular form is  

=>        

=>        

=>          

=>        

Now the area of the wire as a circle is

    =>          

     =>    

The  length of one side of the square is

Now the area of the wire as a square is

=>          

Generally the induced emf is mathematically represented as

=>      

=>      

.) the observation by semmelweis that more mothers died of childbed fever when their doctors also worked in the morgue

5 w for 1hr = 5x60x60 joules=300x60=3000x6=18,000j as total energy conversion. efficiency of bulb needed for radiant to thermal within 18000