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The image shows a diagram of electromagnets, labeled as Fig. 40.22, within the context of text discussing electromagnets and their properties. The diagram depicts two vertical soft iron cores, labeled A and B, each wrapped with coils of wire that are connected in a circuit. The circuit includes a battery and a variable resistor. Core A is labeled with 'S' indicating a south pole, and core B with 'N' indicating a north pole. A soft iron bar connects the tops of both cores. Labels point to "Soft iron" and "Electromagnet (temporary magnet)" near the cores. The surrounding text discusses the use of electromagnets, their magnetization and demagnetization properties, and their temporary magnetic nature. Another section discusses applications of electromagnets.
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