Science - Circuits and Conductors Day 2

Circuits and Conductors - Day 2

Circuits

Students will be able to identify and classify materials that conduct electricity

Multiple Choice

Will the light bulb in this circuit light and why/why not?

• yes, because it has two batteries
• no, because the switch is open
• yes, because it is in a circuit
• no, because the bulb is burned out

​The Path of Electricity: a Circuit

​I. Electricity flows in a path.

• This path is called a circuit.

• ALWAYS starts at the positive input.

  • Electricity (electrons) flow from the positive end through a wire to the output.

  • The output transforms electricity into other forms of energy: light, heat, sound, and mechanical.

    • Then, electricity continues its flow through the wire to the negative end of the circuit.

Multiple Choice

The path of electricity ALWAYS travels negative to positive

• TRUE

• FALSE

Multiple Choice

The __________ transforms electricity into other forms of energy

• input

• battery

• wires

• output

Multiple Choice

The path always starts at the ______________.

• negative input

• positive input

• positive output

• negative output

​II. Every electrical circuit has a positive end and a negative end.

• All batteries have a + end and a – end.

• All plugs have two metal pieces for the same reason. The third metal piece on some plugs helps to protect from shocks.

• Connecting the inputs, wires, and outputs in a circuit in the right order is important, or the circuit will not work.

Multiple Choice

I allow electricity to run through me easily.

• fuse
• conductor
• insulator
• electric circuit

Multiple Choice

Electric current flows from

• detect electric current

• negative terminal to positive terminal

• positive terminal to negative terminal

• the flow rate of electric charges through a conductor

Multiple Choice

negative charge

• a form of energy

• a red metal

• a silver metal

• an object is negatively charged if it has excess of electrons

Multiple Choice

electricity

• a form of energy resulting from the existence of electrons being moved

• an instrument using a magnet that shows where north is

• a piece of iron that has a magnetic field and attracts or repels other metals

• metal drawn out in a thin, flexible line

Multiple Choice

battery

• - An object is negatively charged if it has an excess of electrons

   

• a piece of iron that has a magnetic field and attracts or repels other metals

• a silvery, white metal

• a small container where chemical energy is converted into electricity

​III. When a circuit does not work, there are step‐by‐step things to do to check the circuit:

1. Check the battery in a different circuit to make sure it isn’t dead.

2. Check the bulb in a different circuit to make sure it isn’t dead.

3. Check the wires to make sure they are connected correctly: positive, to bulb, back to negative.

4. ​Check to make sure that all connections are clean and wires are touching.

​This sequence of events is called troubleshooting. Most of the time when something doesn’t work, it is because it isn’t plugged in or the wires aren’t connected the right way. Troubleshooting the circuit will identify whether it is the battery, bulb, or connections that are causing the circuit to fail.

Multiple Choice

An incomplete circuit is shown.
To complete the circuit, a wire should be placed from —

• Point D to Point C
• Point B to Point C
• Point A to Point D
• Point B to Point D

Multiple Choice

Which bulbs will light?

• 1 and 2
• 2 and 3
• 3 and 4
• 4 and 2

Multiple Choice

Choose the correct sentence.

• This circuit will work because it is an open circuit.
• This circuit will work because it is a closed circuit.
• This circuit will NOT work because it is an open circuit.
• This circuit will NOT work because it is a closed circuit.

Multiple Choice

Student A has constructed a circuit including a battery, two wires, and a bulb. When the circuit is closed, the bulb does not light. Student A tested the battery on another circuit, and the battery works. All of the connections on Student A’s circuit are correct and tight. What is the MOST LIKELY reason Student A’s circuit is not working?

• the battery is dead

• the bulb is burned out

• the wires are connected wrong

• a connection is loose

Circuit Construction Kit: AC - Virtual Lab - RLC Circuit | AC Circuits | Kirchoff's Law - PhET Interactive Simulations

You can open this webpage in a new tab.

Copy link

Open in new tab