An electromagnet with soft iron core is a temporary magnet.

Answer

**Step-by-Step Solution:**

1. **Understanding Electromagnets**: An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. It consists of a coil of wire, often wrapped around a core material.

2. **Core Material**: In this case, the core material is soft iron. Soft iron is chosen because it can easily become magnetized when an electric current flows through the coil wrapped around it.

3. **Current Flow**: When electric current passes through the coil, it generates a magnetic field. This magnetic field magnetizes the soft iron core, causing it to behave like a magnet.

4. **Temporary Magnet**: The key point about an electromagnet with a soft iron core is that it is a temporary magnet. This means that it only exhibits magnetic properties while the current is flowing through the coil.

5. **Loss of Magnetism**: Once the electric current is stopped, the soft iron core loses its magnetism almost immediately. It returns to its original state as a non-magnetic material.

6. **Conclusion**: Therefore, the statement that an electromagnet with a soft iron core is a temporary magnet is true. It only acts as a magnet when current is applied and loses its magnetism when the current is turned off.

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