Electricity and Magnetism

The force or push that causes electric charges to move is called ___________.

• resistance
• current
• voltage difference
• static electricity

Tags

NGSS.MS-PS2-5

Electric charges always flow from ________ areas to ___________ areas.

• positive, negative
• positive, neutral
• negative, positive
• neutral, negative

A material through which electrons do NOT flow easily is a(n) ____________ .

• insulator
• conductor
• fuse
• circuit breaker

Tags

NGSS.MS-PS1-2

Which of the following statements about electric charge is true?

• Objects must be touching on another to exert electrical force.
• Electrical forces act at a distance.
• Air cannot conduct electricity; it is conducted only by solid materials.
• Opposite electric charges always repel one another.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Mr. Jacobson and his class are conducting an experiment. The class needs to choose a good insulator. Which of the following could be used as an insulator?

• plastic plate

• copper wire

• silver spoon

• gold necklace

Tags

NGSS.MS-PS3-3

Which of the following will increase the resistance of a wire?

• using a thicker/wider wire
• using a shorter wire
• Increasing the temperature of the wire
• using silver instead of copper

What is the current produced by a 9-volt battery flowing through a resistance of 0.2 ohms?

• 1.8 amps
• 0.022 amps
• 45 amps
• 8.8 amps

Which two areas of physical science are closely related to the development of electric motors and generators?

• sound and light
• ight and magnetism
• electricity and sound
• electricity and magnetism

Tags

NGSS.MS-PS2-3

Which of the following will decrease the strength of the magnetic field around a wire?

• increasing the current flowing through the wire
• using less loops around the iron core
• flipping the direction of the current flowing through the wire
• using a larger iron core

Tags

NGSS.HS-PS2-5

Silver has a resistance of 0.0198 ohms. What voltage would produce a current of 100 amps?

• 1.98 V
• 5,050 V
• 0.000198 V
• 100.0198 V