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प्रश्न
State two precautions that you must take when switching on an electric circuit.
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उत्तर
Precautions to be taken before the circuit is switched on, the following precautions must be taken:
- See that all the components of the circuit are properly connected.
- See that the connection wire is tightly connected to each appliance or component.
- Do not touch the switch or any component with wet hands.
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संबंधित प्रश्न
Fill in the blank
In a torch we use ______ as the source of electricity.
Mention two advantages of a dry cell.
Can the cell used in the clock gives us an electric shock? Justify your answer.
Secondary cells are used in ______.
Primary cells are used in mobile phones.
Analogy.
Primary cells:: Toys
Secondary cells:: ______.
What are the types of cells? Give examples.
Match the following
| 1. | Dry cells | a. | Reversible |
| 2. | Electrolyte | b. | Opens or closes the circuit |
| 3. | Switch | c. | Solution |
| 4. | Secondary cell | d. | Torches |
Choose the incorrect statement.
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?
