Exam Review: Electric Current

What is electric current?

• The flow of protons from a place where there are more protons to a place where there are fewer

• The flow of electrons from a place where there are more electrons to a place where there are fewer

• The flow of neutrons from a place where there are more neutrons to a place where there are fewer

• The flow of atoms from a place where there are more atoms to a place where there are fewer

Tags

NGSS.HS-PS2-5

Current is measured in _______.

• Amps

• Volts

• Ohms

• Watts

Tags

NGSS.HS-PS2-5

For an electric charge to move from one position to another, what must be present between the two positions?

• There must be a difference in electric potential energy between the two positions.

• There must be a difference in temperature between the two positions.

• There must be a difference in mass between the two positions.

• There must be a difference in color between the two positions.

Tags

NGSS.HS-PS3-5

What would give electrons potential energy? (i.e. what would cause them to move from one place to another?)

• A difference in electric potential (voltage)

• A constant electric field

• A uniform magnetic field

• A neutral environment

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

What is the difference in electrical potential energy measured in?

• Voltage

• Current

• Resistance

• Power

What is the unit for voltage?

• Ampere (A)

• Ohm (Ω)

• Volt (V)

• Watt (W)

What does a voltage source (e.g. a battery) cause electrons to do?

Tags

NGSS.HS-PS3-5

What are the two types of current?

• Direct and Parallel

• Direct and Alternating

• Alternating and Series

• Series and Parallel

Electric charges always move spontaneously from a position where they have higher potential energy to a position where they have lower potential energy.

• True

• False

The electrons can do work based on their position and electric fields (electrical potential energy). What things must be present for this to occur?

• A chemical reaction and temperature
• A gravitational field and mass
• A magnetic field and a current
• Voltage and a conducting pathway through the working object.

Tags

NGSS.HS-PS3-5