Electricity and Magnetism TEST REVIEW

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

• resistance
• voltage difference

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Electric charges always flow from ___________ areas to __________ areas.

• positive, negative
• negative, positive

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

• insulator
• conductor

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.

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

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

What is the current produced by a 9-volt battery flowing through a resistance of 0.2 ohms? I= V/R

• 1.8 amps
• 45 amps

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

• electricity and sound
• electricity and magnetism

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

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

• using less loops around the iron core
• increasing the current flowing through the wire

Tags

NGSS.MS-PS2-3

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

• 1.98 V
• 0.000198 V