A small rectangular loop of wire is located close to a long straight wire initially carrying a current I = 104 A (see figure below). Find the average emf induced in the loop if the current in the wire reverses direction in a time interval of 1/143 s.
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A small rectangular loop of wire is located close to a long straight wire initially carrying a current I = 104 A (see figure below). Find the average emf induced in the loop if the current in the wire reverses direction in a time interval of 1/143 s.
| magnitude | |
| direction |
Given,
Current flowing in the wire is
From the figure,
A rectangular loop is situated at a distance of 10 cm from the wire.
So, separation between the wire and loop is
And the area of the loop is
So magnetic flux passing through the wire is
Where B is the magnetic field due to wire.
Then emf induced in the loop will be
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