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Question
Using an electromagnet, you can make a working model of a railway signal as shown in figure.
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Solution
Working Model of a Railway Signal Using an Electromagnet
Components:
- Cardboard Signal: Indicates the railway signal.
- Electromagnet: Coil wrapped around an iron nail.
- Battery: Powers the electromagnet.
- Switch: Controls the electromagnet.
- Thread: Connects the electromagnet to the cardboard signal.
Steps:
-
Setup:
- Mount the cardboard signal on a stand.
- Attach a thread to the signal and pass it over a pulley to the electromagnet.
-
Electromagnet Creation:
- Wrap a coil of wire around an iron nail.
- Connect the coil to a battery via a switch.
-
Operation:
- Turning on the switch powers the electromagnet.
- The electromagnet pulls the iron nail, moving the thread and changing the signal's position.
- Turning off the switch deactivates the electromagnet, allowing the signal to return.
Visual Representation:
The provided image illustrates the setup with labelled components, demonstrating how the electromagnet controls the railway signal.
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