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प्रश्न
Name safety measures commonly used in electric circuits and appliances.
Name two safety measures commonly used in electric circuits and appliances.
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उत्तर १
Following safety measures should be followed while using electricity :
- Wires carrying electricity should not be touched bare footed.
- While working with electricity, one must wear gloves made up of insulated material and rubber sole shoes.
- The insulation of the wire must be checked periodically.
- The electrical appliances must be earthed.
- The electric circuits should be switched off during lighting.
- An electric fuse is a very safety device. Electric fuse of proper rating should be used to stop the flow of excess electric current and to solve save the electrical appliances.
- For avoiding overloading, many appliances should not be connected at a time in the circuit.
उत्तर २
- Fuses: Fuses protect circuits from excessive current flow. When the current crosses a safe threshold, the fuse wire melts and prevents the circuit, avoiding further harm.
- Circuit Breaker: Circuit breakers use an electromagnet or bimetallic strip to open the circuit when excessive current flows through it.
Notes
Students should refer to the answer according to their questions and provided marks.
संबंधित प्रश्न
When does short circuiting take place?
What happens to the flow of electric current during a short circuit?
What is overloading?
How can the effects of overloading be avoided?
An electric oven of 2 kW is operated in a domestic electric circuit (220 V) that has a current rating of 5 A. What result do you expect? Explain.
Describe how an electromagnet could be used to separate copper from iron in a scrap yard.
What is the usual capacity of an electric fuse used in the power circuit, of a small house?
When does an electric short circuit occur?
In which wire in a A.C. housing circuit is the switch introduced to operate the lights?
Usually three insulated wires of different colours are used in an electrical appliance. Name the three colours.
What is the usually colour of the insulation of :
(a) live wire
(b) neutral wire
(c) earth wire?
Give two reasons why different electrical appliances in a domestics circuit are connected in parallel.
Fill in the following blank with suitable words:
A fuse should always be places in the ........... wire of a mains circuit.
A fuse should always be placed in the ____________.
The most important safety method used for protecting home appliances from short-circuiting or overloading is ____________.
The most important safety method used for protecting home appliances from short circuiting or overloading is
How does an electric fuse prevent the electric circuit and the appliances from a possible damage due to short circuiting or overloading.
Why is it necessary to earth metallic appliances?
