An infinetly long wire carrying a current is placed at a distance 'a' from a square loop of side 'a' as shown in the figure .
If the resistance of the loop is R , Then power dissipated in loop is
As we have learned
Induced Power -
- wherein
It depends on time and resistance
Consider a stirp of width dx at a distance x from the current carrying wire , the magnetic field at distance x is
Let be the flux through the elemental area adx , then
Total flux through the square loop is
Now induced emf ,
Power dissipated in loop is ,