11581832
Descripción
Test por Jeffrey Piggott, actualizado hace más de 1 año
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Creado por Jeffrey Piggott
hace casi 7 años
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Pregunta 1
Pregunta
Which statement is not true?
Respuesta
-
A south pole repels a north pole.
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A south pole repels a south pole.
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A north pole attracts a south pole.
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A north pole repels a north pole.
Pregunta 2
Pregunta
Which pair of materials are both magnetic materials?
Respuesta
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silver and gold
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iron and plastic
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copper and steel
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iron and steel
Pregunta 3
Pregunta
Which of these changes will make an electromagnet stronger?
Respuesta
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Use more coils of wire.
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Use a smaller current.
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Use a wooden core.
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Use fewer coils of wire.
Pregunta 4
Pregunta
Which of these is NOT a reason why electromagnet are used?
Respuesta
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They can be switched off.
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They are more expensive.
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Their strength can be controlled.
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They can be very strong.
Pregunta 5
Pregunta
A magnetic field is:
Respuesta
-
a piece of ground with lots of iron in it.
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the space around a magnet where it attracts magnetic materials.
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the space around a magnet where it attracts all metals.
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the space around a magnet where it repels magnetic materials.
Pregunta 6
Pregunta
Which diagram shows the shape of the magnetic field of a bar magnet?
Respuesta
Pregunta 7
Pregunta
The direction of a magnetic field is from:
Respuesta
-
the south pole to the north pole.
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the north pole to the south pole.
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the west pole to the east pole.
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the east pole to the west pole.
Pregunta 8
Pregunta
The Earth’s north magnetic pole is:
Respuesta
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near the North pole.
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near the South pole
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at the North pole.
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at the South pole.
Pregunta 9
Pregunta
Magnetism is a non-contact force.
Respuesta
- True
- False
Pregunta 10
Pregunta
Two pieces of iron attract each other.
Respuesta
- True
- False
Pregunta 11
Pregunta
An electromagnet needs electricity.
Respuesta
- True
- False
Pregunta 12
Pregunta
Bar magnets are permanent magnets.
Respuesta
- True
- False
Pregunta 13
Pregunta
A magnet will attract a steel can.
Respuesta
- True
- False
Pregunta 14
Pregunta
Electromagnets often have iron cores.
Respuesta
- True
- False
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