Circuits

The difference in electrical potential between two points....measured in Volts.

• Electrical power

• Voltage

• Resistance

• Current

Classify the following as electrical conductors or insulators...rubber, aluminum foil, glass.

• Aluminum foil and glass are conductors. Water is an insulator.

• Aluminum foil is a conductor. Rubber and glass are insulators.

• Aluminum foil and rubber are conductors. Glass is an insulator.

• All three are conductors.

Tags

NGSS.HS-PS3-5

Which is NOT true of a parallel circuit?

• Electrons can travel in more than one path in a parallel circuit.

• In a parallel circuit, the current is divided between the different paths.

• When one bulb is broken in a parallel circuit, the circuit will no longer allow electrons to flow.

• Voltage is the same across all paths in a parallel circuit.

Which is true of a series circuit?

• Electrons can travel in more than one path in a series circuit.

• In a series circuit, the current is divided between the different paths.

• When one bulb is broken in a series circuit, the circuit will no longer allow electrons to flow since there is only 1 path.

• Voltage is the same across all paths in a series circuit.

In the circuit shown below, when the switch is closed, all of the light bulbs are lit. Which light bulbs will remain lit when the switch is opened, as shown in the diagram?

• Only Bulb 1 will remain lit.

• Only Bulb 1 and Bulb 3 will remain lit.

• Only Bulb 1 and Bulb 2 will remain lit.

• None of the bulbs will be lit since the switch is open.

Tags

NGSS.MS-PS2-3

Voltage is...

• the difference in electrical potential between two points, measured in VOLTS.

• the amount of energy needed to move a charged particle from one point to another in an electrical field, measured in Joules.

• a measurement of how an object opposes the flow of electric current through it, measured in Ohms.

• the flow of electrical charge through an object or medium, measured in Amperes.

Electrical power is...

• the difference in electrical potential between two points...measured in Volts.

• an electrical component that provides electrical resistance in a circuit....measured in Ohms.

• the flow of charged particles...measured in Amps.

• the rate at which electricity passes through an electric circuit...measured in Watts.

What is a circuit?

• A circuit is a closed loop of conductors through which an electrical current can flow.

• A circuit is an electrical component that provides electrical resistance.

• A circuit is the potential energy per unit charge, depends only on the location and the charge within the electric field.

• A circuit is the amount of energy needed to move a charged particle from one point to another in an electrical field.

A hair salon uses 1800 Watt hair dryers plugged into 120 V outlets. The salon has circuit breakers that trip if the current in the circuit exceeds 30 Amps. How many hair dryers can be used at the same time if they are pugged into the same circuit? (P=IV)

• An unlimited number of hair dryers

• 1 hair dryer

• No hairdryers

• 2 hair dryers

Tags

NGSS.HS-PS3-5

Which statement does not characterize electrical conductors?

• Conductors allow charges to move freely through them.

• Conductors support the flow of electric current.

• Metals are examples of electrical conductors.

• Conductors have tightly bound outer electrons.