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प्रश्न
State two precautions that you must take when switching on an electric circuit.
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
Write true or false for a given statement.
We use cell as the source of electricity to run an electric immersion rod.
Name the +ve terminal of dry cell.
Secondary cell can be used only once.
Name the device used to generate electricity.
______ cell is used to operate devices such as mobile phones, computers, and emergency lights.
A battery is a group of ______.
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 |
An electric bulb is connected to a cell through a switch as shown in Fig. 12.7. When the switch is brought in the ‘ON’ position, the bulb does not glow. What could be the possible reason/s for it? Mention any two of them.
A torch requires 3 cells. Show the arrangement of the cells, with a diagram, inside the torch so that the bulb glows.
Think of six activities that use electric current. Also, name the devices used to perform the activity.
| Example: | Activity you perform | Device |
| Get light | Torch | |
