electricity and magnetism

Electric charges always flow from _____ areas to _____ areas.

• positive, negative

• negative, positive

• positive, neutral

• neutral, negative

Tags

NGSS.HS-PS2-4

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

• insulator

• fuse

• conductor

• circuit breaker

Tags

NGSS.HS-PS2-6

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.HS-PS2-4

NGSS.HS-PS3-5

Mr. Robinson 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

• silver spoon

• copper wire

• 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

The function of a generator is to change ____.

• chemical energy to electrical energy

• electrical energy to chemical energy

• electrical energy to mechanical energy

• mechanical energy to electrical energy

Tags

NGSS.HS-PS3-3

This exerts a force that causes other electric charges to move.

• electrical poles

• electrical fields

• insulators

• conductors

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

The Law of Conservation of Charge states that _____.

• charge can be created and destroyed but NOT transferred.

• charge cannot be created and destroyed but it can be transferred.

• charge cannot be created and destroyed and it cannot be transferred.

• none of the above

Tags

NGSS.HS-PS2-4

Match the following

• Positively charged particles in an atom

• Electrons

• A device that detects electric charge on an object

• Protons

• When non-magnetic materials become attracted to magnets

• Neutrons

• Negatively charged particles in an atom

• Electroscope

• Particles in the atom that have no charge

• Ferromegnetism

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

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

• 1.98 V

• 0.000198 V

• 5,050 V

• 100.0198 V

Tags

NGSS.HS-PS2-5