Hardeep is trying to create a closed electric circuit. What all items does he need to make a closed circuit?
Answers
Answer:
Small light bulb (or a flashlight bulb)
2 batteries (with the correct voltage for your light bulb)
2 alligator clip wires or aluminum foil*
Paper clips
Electrical tape (Scotch®tape also works)
Bulb holder (optional)
Battery holders (optional**)
*To use foil instead of wires, cut 2 strips each 6″ long and 3″ wide. Fold each one tightly along the long edge to make a thin strip.)
**To use paper clips instead of battery holders, tape one end of a paper clip to each end of your battery using thin strips of tape. Then connect your wires to the paper clips.
Part 1 – Making a Circuit:
Connect one end of each wire to the screws on the base of the light bulb holder. (If you’re using foil, ask an adult to help you unscrew each screw enough to fit a foil strip under it.)
Connect the free end of one wire to the negative (“-“) end of one battery. Does anything happen?
Attach the free end of the other wire to the positive (“+”) end of the battery. Now what happens?
Part 2 – Adding Power
Disconnect the battery from your circuit. Stand one battery so that the “+” end is pointing up, then set the other battery next to it so that the flat “-” end is pointing up. Tape around the middle of the batteries to hold them together.
Set a paperclip across the batteries so that it connects the “+” end of one to the “-” end of the other. Tape the paperclip in place with a narrow piece of tape (do not tape over the metal battery ends).
Turn the batteries over and tape one end of a paper clip onto each of the batteries. Now you can connect one wire to each paper clip. (The bottom of the battery pack should only have one paper clip – do not connect a wire to it.)
Connect the free ends of the wires to the light bulb.
(Note: Instead of steps 1-3, you can use two batteries in battery holders and connect them together with one wire.)
What Happened:
circuit science In the first part, you learned how to make a circuit with a battery to light up a light bulb.
Batteries supply electricity. When they’re connected properly, they can “power” things, like a flashlight, an alarm clock, a radio… even a robot!
Why didn’t the light bulb light up when you connected it to one end of the battery with a wire?
Electricity from a battery has to flow out one end (the negative or “-” end) and back in through the positive (“+”) end in order to work.
What you built with the battery, wire, and bulb in step 3 is called an open circuit.
In order for electricity to start flowing, you need a closed circuit. Electricity is caused by tiny particles with negative charges, called electrons.
When a circuit is complete, or closed, electrons can flow from one end of a battery all the way around, through the wires, to the other end of the battery. Along its way, it will carry electrons to electrical objects that are connected to it – like the light bulb – and make them work!
In the second part, you added another battery. That should have made the light bulb burn more brightly, because two batteries together can supply more electricity than just one!
The paper clip across the bottom of the battery pack allowed electricity to flow between the batteries, making the flow of electrons stronger.
MARK ABOVE AS BRAINLIEST
- Small light bulb (or a flashlight bulb)
- 2 batteries (with the correct voltage for your light bulb)
- 2 alligator clip wires or aluminum foil*
- Paper clips
- Electrical tape (Scotch®tape also works)
- Bulb holder (optional)
- Battery holders (optional**)
*To use foil instead of wires, cut 2 strips each 6″ long and 3″ wide. Fold each one tightly along the long edge to make a thin strip.)
**To use paper clips instead of battery holders, tape one end of a paper clip to each end of your battery using thin strips of tape. Then connect your wires to the paper clips.
Part 1 – Making a Circuit:
Connect one end of each wire to the screws on the base of the light bulb holder. (If you’re using foil, ask an adult to help you unscrew each screw enough to fit a foil strip under it.)
Connect the free end of one wire to the negative (“-“) end of one battery. Does anything happen?
Attach the free end of the other wire to the positive (“+”) end of the battery. Now what happens?
Part 2 – Adding Power
Disconnect the battery from your circuit. Stand one battery so that the “+” end is pointing up, then set the other battery next to it so that the flat “-” end is pointing up. Tape around the middle of the batteries to hold them together.
Set a paperclip across the batteries so that it connects the “+” end of one to the “-” end of the other. Tape the paperclip in place with a narrow piece of tape (do not tape over the metal battery ends).
Turn the batteries over and tape one end of a paper clip onto each of the batteries. Now you can connect one wire to each paper clip. (The bottom of the battery pack should only have one paper clip – do not connect a wire to it.)
Connect the free ends of the wires to the light bulb.
(Note: Instead of steps 1-3, you can use two batteries in battery holders and connect them together with one wire.)
What Happened:
circuit science In the first part, you learned how to make a circuit with a battery to light up a light bulb.
Batteries supply electricity. When they’re connected properly, they can “power” things, like a flashlight, an alarm clock, a radio… even a robot!
Why didn’t the light bulb light up when you connected it to one end of the battery with a wire?
Electricity from a battery has to flow out one end (the negative or “-” end) and back in through the positive (“+”) end in order to work.
What you built with the battery, wire, and bulb in step 3 is called an open circuit.
In order for electricity to start flowing, you need a closed circuit. Electricity is caused by tiny particles with negative charges, called electrons.
When a circuit is complete, or closed, electrons can flow from one end of a battery all the way around, through the wires, to the other end of the battery. Along its way, it will carry electrons to electrical objects that are connected to it – like the light bulb – and make them work!
In the second part, you added another battery. That should have made the light bulb burn more brightly, because two batteries together can supply more electricity than just one!
The paper clip across the bottom of the battery pack allowed electricity to flow between the batteries, making the flow of electrons stronger.