1. The problem statement, all variables and given/known data The current in coil P is constant. An iron rod is inserted into coil P. Coil Q is placed next to P with a voltmeter connected to it. Explain why, during the time that the rod is moving, there is a reading on the voltmeter connected to coil Q 2. Relevant equations emf=-Dphi/dt 3. The attempt at a solution I believe that the Iron rod will first be magnetised and then the magnetic lines originating from Iron will cause a change of flux in coil Q.