Let's analyze each of the six circuit diagrams and determine whether each circuit is
open or
closed.
Definitions:
- A
closed circuit has a complete path for current to flow from the power source (battery) through the components (like bulbs) and back to the source.
- An
open circuit has a break in the path — such as an open switch or disconnected wire — so current cannot flow.
Now, let’s go through each diagram:
---
1)
- Battery → two bulbs in series → one bulb → back to battery.
- There are no switches or breaks visible.
✔ The path is continuous.
➡️
Closed Circuit
---
2)
- Battery → one bulb → switch → another bulb → back to battery.
- The switch is
open (it's shown in the "up" position).
✘ Break in the circuit due to open switch.
➡️
Open Circuit
---
3)
- Battery connected to two parallel branches, each with a bulb.
- A switch is in the
main line (before the split), and it is
open.
✘ Since the switch is open, no current can flow into either branch.
➡️
Open Circuit
---
4)
- Battery → three resistors (or bulbs) in series → one bulb → back to battery.
- All connections appear intact. No switch shown.
✔ Continuous path.
➡️
Closed Circuit
---
5)
- Battery → switch → two bulbs in series → back to battery.
- The switch is
open (shown in the "up" position).
✘ Break in the circuit.
➡️
Open Circuit
---
6)
- Battery → switch → two bulbs in
parallel → back to battery.
- The switch is
closed (shown in the "down" position).
✔ Complete path: current flows from battery through the closed switch and splits to both bulbs.
➡️
Closed Circuit
---
Final Answers:
1)
Closed
2)
Open
3)
Open
4)
Closed
5)
Open
6)
Closed
---
✔ Summary:
- Circuits 1, 4, and 6 are
closed (complete path).
- Circuits 2, 3, and 5 are
open (breaks in the path due to open switches).
Let me know if you'd like a visual explanation or how to draw these!
Parent Tip: Review the logic above to help your child master the concept of electrical circuits worksheet.
