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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.
Arrange in sequence
| A CELL | A DEVICE | ELECTRICAL ENERGY |
| IS CALLED | IN TO | CHEMICAL ENERGY |
| THAT CONVERTS |
______ Cells used in automobiles like cars and buses are large and very heavy.
Analogy.
Primary cells:: Toys
Secondary cells:: ______.
What are the types of cells? Give examples.
______ cell is used to operate devices such as mobile phones, computers, and emergency lights.
Name the substance that becomes ions in solutions and acquires the capacity to conduct electricity.
Paheli wanted to glow a torch bulb using a cell. She could not get connecting wires, instead, she got two strips of aluminium foil. Will she succeed? Explain, how?
Fig. 12.10 A and B, show a bulb connected to a cell in two different ways.
Will the bulb glow in both the cases?
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?
