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प्रश्न
Think of six activities which use electric current. Also name the devices used to perform the activity.
| Example: | Activity you perform | Device |
| Get light | Torch | |
| ___________ | -------------- | |
| ___________ | -------------- | |
| ___________ | -------------- | |
| ___________ | -------------- |
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उत्तर
| Example: | Activity you perform | Device |
| Get light | Torch | |
| Prepare an icecream | Refrigerator | |
| Watch movies | Television | |
| Listening songs | Radio | |
| Talk to someone far | Telephone | |
| Ironing clothes | Electric iron |
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संबंधित प्रश्न
Mention two advantages of a dry cell.
The device which converts chemical energy into electrical energy is
Secondary cell can be used only once.
Name the device used to generate electricity.
Assertion (A): Primary cells can not be recharged, they can be used only once.
Reason (R): In vehicles, we use primary cells.
______ cell is used to operate devices such as mobile phones, computers, and emergency lights.
A torch requires 3 cells. Show the arrangement of the cells, with a diagram, inside the torch so that the bulb glows.
When the chemicals in the electric cell are used up, the electric cell stops producing electricity. The electric cell is then replaced with a new one. In case of rechargeable batteries (such as the type used in mobile phones, camera and inverters), they are used again and again. How?
Figure A and B, show a bulb connected to a cell in two different ways.
- What will be the direction of the current through the bulb in both the cases. (Q to P or P to Q)
- Will the bulb glow in both the cases?
- Does the brightness of the glowing bulb depend on the direction of current through it?
Fig. 12.10 A and B, show a bulb connected to a cell in two different ways.
Does the brightness of the glowing bulb depend on the direction of current through it?
