A closed copper loop is to the right of a fixed electromagnet and is free to move horizontally. The end of the electromagnet nearest the loop is a north pole. The current in the electromagnet decreases, so the magnetic field through the loop becomes weaker. Which statement correctly describes the force that acts on the loop?
To the right, because the induced current's magnetic field opposes the decrease in the magnetic field through the loop
To the left, because the induced current's magnetic field opposes the decrease in the magnetic field through the loop
To the right, because the induced current's magnetic field makes the magnetic field through the loop decrease more quickly
To the left, because the induced current's magnetic field makes the magnetic field through the loop decrease more quickly
96 exam-style questions on AQA GCSE Physics 7.3 Induced potential, transformers and the National Grid (HT only), covering 7.3.1 Induced potential (HT only), 7.3.2 Uses of the generator effect (HT only), 7.3.3 Microphones (HT only), and 7.3.4 Transformers (HT only). Each one has a worked solution and a mark scheme showing where the marks go.