question

(a) a rectangular coil rotates in a uniform magnetic field. obtain an expression for induced emf and current at any instant. also find their peak values. show the variation of induced emf versus angle of rotation on a graph.

(b) an iron bar falling through the hollow region of a thick cylindrical shell made of copper experiences a retarding force. what can you conclude about the nature of the iron bar ? explain.

 

 

 

 

 

 

 

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