Arrangement Aluminium Faces Electromagnet Current Through Altered Variable Resistor

In the arrangement shown, an aluminium ring Q faces an electromagnet P the current I through P can be … (d) P attracts Q, when I…

Answers:

Correct option: (a,d)

 Explanation:

  When I increases, field associated with P increases. So Q lies in a field that increases or we can say that apparently Q moves closer to P. hence P and Q must repel each other. Similarly I decreases , then O attracts Q.