Answer:
Rusting of iron is slow in desert area because rusting happens when iron articles react with atmospheric oxygen and moisture and produced a substance called rust. in desert areas there is less moisture in air as compared to coastal area therefore rusting is slow.
Answer:
A) 
B) 
Explanation:
a) using Guass law
Here
Volume charge density is given as
net charge is given as
therefore 
After solving electric field equation we get
b) electric potential difference is given as
at r = 0
It’s a force which acts on an object without coming physically in contract with it.
A warmer to cooler objects
