Advertisements
Advertisements
प्रश्न
What is the function of an earth wire?
उत्तर
Earth wire is used as a safety measure in an electrical circuit. Especially in those appliances whose cover is metallic; Like- electric iron, toaster, table fan, refrigerator, cooler, geyser etc.
APPEARS IN
संबंधित प्रश्न
What happens to the resistance of the circuit during a short circuit?
What is overloading?
How can the effects of overloading be avoided?
Name safety measures commonly used in electric circuits and appliances.
State whether the following statement is true or false.
A wire with a green insulation is usually the live wire of an electric supply.
Draw a circuit diagram to show how a soft iron piece can be transformed into an electromagnet.
What is the usual capacity of an electric fuse used in the power circuit, of a small house?
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:
The earth wire should be connected to the ........... of an appliance.
State the voltage at which electricity is supplied to our houses.
Answer the following question:
What is overloading? When does it occur? How can overloading be avoided?
A fuse should always be placed in the ____________.
Which among these are the main characteristics of fuse element?
Overloading is due to
Switches are connected to ____________.
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?
