Respuesta :
When the north-pole end of a bar magnet is held near a stationary positively charged piece of plastic, it remains unaffected.
What is a bar magnet?
A bar magnet is made of ferromagnetic substance that produces
magnetic field.
What are the properties of a bar magnet?
- Magnets attract ferromagnetic materials like iron, cobalt and nickel.
- Like poles repel each other and unlike poles attract each other.
- The strength of both poles is always the same.
- When a magnetic material is kept in contact with a bar magnet it acquires the magnetic property.
- Some materials like gold, silver and water get repelled by magnets.
Since plastic is not a ferromagnetic material or any other material like gold and silver ,they remain unaffected in the presence of magnetic field.
To learn more about magnetic field: https://brainly.com/question/23096032
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