a.[3]
Draw the magnetic field pattern in the gap between the South and North poles of the magnets shown below.
Include arrows on your field lines.
b.[1]
Describe one difference between a permanent magnet and an induced magnet.
c.[2]
A student investigates electromagnets and writes the following:
ElectromagnetsAn electromagnet is a solenoid with an iron core.When an electric current flows through the wire, a gravitational field is created.The strength of this field can be increased by decreasing the current or byincreasing the number of turns of the coil. \begin{array}{|l|}\hline \textbf{Electromagnets} \\ \\ \text{An electromagnet is a solenoid with an iron core.} \\ \text{When an electric current flows through the wire, a gravitational field is created.} \\ \text{The strength of this field can be increased by decreasing the current or by} \\ \text{increasing the number of turns of the coil.} \\\hline \end{array} ElectromagnetsAn electromagnet is a solenoid with an iron core.When an electric current flows through the wire, a gravitational field is created.The strength of this field can be increased by decreasing the current or byincreasing the number of turns of the coil.The student makes two mistakes in their description. Identify the two mistakes.