C left
D right
5 a Copy the diagram and draw the magnetic field of the solenoid.
Show both the shape
and the direction of the field lines.
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[3]
b What would happen to the magnetic field if the connections to the cell
were reversed?
c A student placed two metal bars inside the solenoid. When current
was flowing the bars moved apart. Explain why.
Suggest what metal the bars were made from and why.
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