What does magnetic flux linkage mean?
A solenoid with diameter $6.0\,\text{cm}$ and $540$ turns is positioned in a uniform magnetic field, as shown in Fig. 9.1. The way the magnetic flux density varies with time $t$ is shown in Fig. 9.2. Calculate the greatest magnitude of the induced electromotive force (e.m.f.) in the solenoid.
A thin copper sheet X is hung from a rigid rod so that it is suspended between the poles of a magnet, as shown in Fig. 9.3. Sheet X is pulled aside and released so that it oscillates. A motion sensor records the displacement of X. Sheet X is then replaced by a second thin copper sheet Y. Sheet Y has the same overall dimensions as X but is cut into the shape shown in Fig. 9.4. The motion sensor is used again to record the displacement. The graph in Fig. 9.5 shows how the displacement $s$ of each copper sheet varies with time $t$.
State the name of the phenomenon shown by the gradual decrease in the amplitude of the dashed line.
Deduce which copper sheet the dashed line shows. Explain your answer by using the ideas of electromagnetic induction.
State the name of the phenomenon shown by the gradual decrease in the amplitude of the dashed line.
Deduce which copper sheet the dashed line corresponds to. Explain your answer using the ideas of electromagnetic induction.