Advertisements
Advertisements
प्रश्न
In a set up the students coated iron nails with zinc metal and noted that, iron nails coated with zinc prevents rusting. They also observed that zinc initially acts as a physical barrier, but an extra advantage of using zinc is that it continues to prevent rusting even if the layer of zinc is damaged. Name this process of rust prevention and give any two other methods to prevent rusting.
Advertisements
उत्तर
Galvanization - Oiling/greasing/painting/alloying/chromium plating or any other.
APPEARS IN
संबंधित प्रश्न
Why is the tungsten used almost exclusively for filament of electric lamps?
The ‘live’ and the ‘neutral’ wires have potential difference of _______.
What is a short circuit?
Write scientific reason.
A coil made up of alloy Nichrome is used in the electric heater cooker as a resistor.
Explain the importance/uses of fuse wire.
When does overloading occur?
Explain the heating effect of electric current.
A fuse wire repeatedly gets burnt when used with a good heater. It is advised to use a fuse wire of:
Why is parallel arrangement used in domestic wiring?
Anannya responded to the question: Why do electrical appliances with metallic bodies are connected to the mains through a three-pin plug, whereas an electric bulb can be connected with a two-pin plug?
She wrote: Three-pin connections reduce heating of connecting wires.
- Is her answer correct or incorrect? Justify.
- What is the function of a fuse in a domestic circuit?
