Which among the following are the application of portative electromagnets?

Portable electromagnets have a wide range of applications in various industries and scenarios, owing to their ability to create a magnetic field when electricity is applied and to turn it off when the electricity is stopped. Here are some common applications:

1. Scrap Handling and Recycling: Portable electromagnets are widely used in scrap yards and recycling plants to move and sort ferrous metal scrap. They are used in crane attachments to lift and transport heavy metal objects efficiently.

2. Manufacturing and Fabrication: In manufacturing settings, electromagnets are utilized for holding and positioning metal parts for welding, assembly, or processing. They ensure precision and efficiency by securely holding materials in place.

3. Cargo and Load Handling: For lifting and handling heavy loads in docks and warehouses, portable electromagnets serve as an essential tool. They can lift steel plates, bars, and frames, making the loading and unloading processes quicker and reducing manual labor.

4. Magnetic Separation: Portable electromagnets are used in magnetic separation processes, where they help in separating ferrous materials from non-ferrous materials. This is crucial in recycling operations and in some types of mining where separating materials based on their magnetic properties is required.

5. Automotive Applications: In automotive industries, portable electromagnets are used in various stages of vehicle assembly, such as holding parts in place during welding or assembly, enhancing precision and safety.

6. Search and Rescue Operations: In some scenarios, portable electrom