Concept of Field

The diagram shows a magnetic field surrounding a magnet. Where is the magnetic force the strongest?

• Position A

• Position B

• Position C

• Position D

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

A negatively charged ball is hanging from a string. A positively charged rod is held a short distance away. How will the ball be affected?

• The fields on the pith ball and the rod will interact, causing a repulsive force

• It will not be affected because the pith ball and the rod are not touching

• The fields on the pith ball and the rod will interact, causing an attractive force

• It will be affected because only the rod has an electrical field

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Stephan claims that Earth has both a gravitational field and a magnetic field. Which statement best supports his claim?

• Any object will fall to the ground and lightning strikes are neutral

• A bar magnet will fall to the ground and electric fields have gravity

• Any object will fall to the ground and a compass can be used to navigate.

• A compass will point in the direction of both the gravitational and magnetic fields.

Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-5

Object A is shown with magnetic field lines in the first diagram. In the second diagram, object A is shown next to object B. What is object B?

• A magnet

• A nonmagnetic material

• A piece of non-ferrous material

• A piece of Iron

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

A student is brushing her hair. As the hairbrush is brought near her head, the hair seems to reach toward the hairbrush. Which of the following is the best explanation?

• Two electromagnetic fields are interacting.

• Two gravitational fields are interacting.

• Two magnetic fields are interacting.

• Two electric fields are interacting.

Tags

NGSS.MS-PS2-3

A student is conducting an experiment to show magnetic fields. She examines magnetic field lines by using iron filings. What is she investigating?

• What is the shape of electrical field lines between the north and south poles?

• What is the magnitude of iron filings between the poles?

• How are field lines represented by iron filings?

• How are magnetic field lines represented in a bar magnet?

Tags

NGSS.MS-PS2-3

Two aluminium balls are 7 cm apart. One is positively charged and the other is negatively charged. A small magnet is placed between the two balls but is not touching either. The aluminum balls remain stationary. Which statement describes the electric and magnetic fields?

• There is a magnetic field due to the magnet and no electric field.

• There is an electric field between the two balls and no magnetic field.

• There is an electric field between the two balls and a magnetic field due to the magnet.

• There is a magnetic field between the two balls and no electric field.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Object A is shown with magnetic field lines in the first diagram. In the second diagram, object A is shown next to object B. Describe the movement of object B when it is released.

• Magnet B will attract because the field lines of object A have a short distance

• Magnet B will repel because the field lines of object A have been attracted

• Magnet B will repel because the field lines of object A are repelling from object B

• Magnet B will repel because the field lines are going from north to south

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Which of these best describes a magnetic field?

• An invisible region that surrounds the north pole of a magnet

• A region around a magnet in which magnetic forces can be measured

• A measure of the length of a magnet

• The force that pushes two magnets away from each other

Tags

NGSS.MS-PS2-5

A small bar magnet is shown. A compass is placed beside the magnet so that the center of the compass is next to the center of the magnet. Which is True?

• The north pole of the compass needle points in the same direction as the magnet's north pole.

• The north pole of the compass points in the same direction as the magnet's south pole.

• The south pole of the compass needle points at the magnet's north pole.

• The north pole of the compass needle points at the magnet's south pole.

Tags

NGSS.3-PS2-3