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प्रश्न
Using an electromagnet, you can make a working model of a railway signal as shown in figure.
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उत्तर
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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संबंधित प्रश्न
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Read the given passage and answer the following questions:
The home electrical connection consists of ‘live’, ‘neutral’ and ‘earth’ wires. The ‘live’ and the ‘neutral’ wires have potential difference of 220 V. The ‘earth’ is connected to ground. Due to a fault in the equipment or if the plastic coating on the ‘live’ and the ‘neutral’ wires gives a way the two wires come in contact with each other and a large current flows through it producing heat. If any inflammable material (such as wood, cloth, plastic, etc.) exists around that place it can catch fire. Therefore a fuse wire is used as a precautionary measure.
- Name the two wires having potential difference of 220 V.
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