Charges, Currents, Circuits

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

• voltage difference

• current

• static electricity

• resistance

Tags

NGSS.MS-PS2-3

Electric charges always flow from____ areas to_____ areas

• neutral, negative

• positive, negative

• negative, positive

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

• conductor

• insulator

• fuse

Which of the following statements about electric charge is true?

• Electrical forces act at a distance.

• Objects must be touching on another to exert electrical force.

• Objects must be touching on another to exert electrical force.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

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

• increasing the temperature of the wire

• using silver instead of copper

• using a shorter wire

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

• 45 amps

• 1.8 amps

• 0.022 amps

• 8.8 amps

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

• sound and light

• electricity and sound

• light and magnetism

• electricity and magnetism

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

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

This contains a piece of metal that melts if it gets too hot in order to open a circuit. 

• conductor

• fuse

• insulator

• circuit breaker