Field Forces

Magnetic field lines are closet together at the __________.

• poles
• lines

The motion of liquid _______ in the Earth's core creates a magnetic field.

• Iron
• Magnesium

Tags

NGSS.HS-PS2-5

A(n) __________ is a device that has a magnetized needle that can spin freely.

• Compass
• Magnetic Field

Which of the two below result in an attractive force?

• A positive charge and a negative charge

• Two negative charges

• Two south poles

• A north pole and a south pole

• Two postive charges

Tags

NGSS.HS-PS2-4

Static electricity is the buildup of charges between two objects. What best explains why a balloon is attracted to hair when the two have been rubbed together?

• The balloon and hair both have positive charges

• The balloon and the hair both have negative charges

• The balloon and the hair both have neutral charges

• The balloon and the hair both have opposite charges

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Which of the following most closely resembles an electromagnetic?

• 
• 
• 
• 

Tags

NGSS.HS-PS3-5

NGSS.HS-PS2-5

Two bar magnets are held close together. They are released and allowed to move freely. The bar magnets quickly come together. Which best explains why this happens?

• The poles facing one another are both south poles

• The poles facing one another are both north poles

• The poles facing one another are opposite poles

• One magnet was bigger than the other

Tags

NGSS.HS-PS3-5

In an electromagnet, coils of wire are wrapped around a magnetic object to generate a magnetic field. What the is relationship between number of coils and the strength of the magnetic field?

• The more coils an electromagntic has, the stronger the magnetic field

• The more coils an electromagntic has, the weaker the magnetic field

• The larger the metal object, the stronger the magnetic field is

• There is no relationship between number of coils and the strength of a magnetic field

Tags

NGSS.HS-PS2-5

What is the cause of electricity?

• Magnetism

• Gravity

• Moving electrons

• Lightning

Tags

NGSS.HS-PS1-2

The charge on the left is ____ and the charge on the right is ___

• positive ; positive

• negative ; negative

• negative ; positive

• positive ; negative

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5