Q1.
Can you help Nihal by adding some more uses to his lists? Also, suggest some other ways of grouping the uses of electricity.
Answer
Yes. Every heading in Nihal's chart can be made longer, and the whole chart can be re-drawn in other ways.
More uses under his headings:
| Heading | More uses you can add |
|---|---|
| Lighting | Tube lights, LED bulbs, table lamp, emergency lamp, traffic signals, hospital operation-theatre lamps, decorative lights at Diwali |
| Cooking | Induction cooktop, electric rice cooker, roti maker, water purifier, electric tandoor |
| Heating and Cooling | Cooler, hair dryer, iron, cold storage for vegetables, air cooler in a bus |
| Transportation | Metro train, e-rickshaw, electric bus, electric scooter, ropeway |
| Communication | Telephone, television broadcast, radio station, Wi-Fi router, mobile tower |
| Entertainment | Music system, video game, cinema projector, loudspeaker at a mela |
| Others | Tube-well for irrigation, washing machine, sewing machine, X-ray machine, printing press, ATM |
Other ways of grouping the uses:
- By place — home, school, hospital, farm, factory, shop, road.
- By what electricity is changed into — light (bulb), heat (iron), sound (radio), motion (fan), or a mixture (hair dryer gives heat + motion).
- By the source used — devices that run on cells/batteries (torch, remote) and devices that run from a wall socket (refrigerator, geyser).
- By who uses it — household use, farming use, industrial use, medical use, transport use.
Try This: Walk through your own house with a notebook and count the devices that would stop working if the electricity went off. Most students are surprised — the count usually crosses 20.