Fields and Forces

Which of the following forces is attractive but never repulsive?

• Gravitational Force

• Electric Force

• Magnetic Force

• Electromotive Force

Tags

NGSS.MS-PS2-4

Which of the diagrams shows the least gravitational force?

• I

• II

• III

• IV

Tags

NGSS.MS-PS2-4

Which of the following might make the spoons repel each other?

• Neither A nor B is electrically charged.

• Both A and B are negatively charged.

• A is positively charged, and B is negatively charged

• A is negatively charged, and B is not electrically charged.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

What makes an electromagnet stronger?

• Increasing the number of coils in the wire

• Decreasing the number of coils in the wire

• Decreasing the electric current

• Decreasing the voltage

Tags

NGSS.MS-PS2-3

Protons have a ____________ charge and Electrons have a _______________ charge.

• Positive, Positive

• Positive, Negative

• Negative, Positive

• Negative, Negative

These magnets would....

• Repel

• Attract

Tags

NGSS.MS-PS2-3

Which statement is true about both magnetic and electric fields?

• Like charges repel each other

• Like charges attract each other

• Like poles attract each other

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

If electrons transfer from a wool square to a pvc wand, the wool becomes ______________ and the wand becomes_____________.

• Positive, Positive

• Positive, Negative

• Negative, Positive

• Negative, Negative

Moving a magnet near a compass can cause the compass needle to move, even though the magnet does not touch the compass. This observation is evidence for which characteristics of magnetic fields?

• There is a north and south pole on a magnet.

• Fields can exert non-contact forces.

• Magnetic fields do not exist.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

What is the cause of electricity?

• Magnetism

• Gravity

• Moving Electrons

• Lightning