Answer:
1) Option D is correct.
The electric field inside a conductor is always zero.
2) Option A is correct.
The charge density inside the conductor is 0.
3) Charge density on the surface of the conductor at that point = η = -E ε₀
Explanation:
1) The electric field is zero inside a conductor. Any excess charge resides entirely on the surface or surfaces of a conductor.
Assuming the net electric field wasn't zero, current would flow inside the conductor and this would build up charges on the exterior of the conductor. These charges would oppose the field, ultimately (in a few nanoseconds for a metal) canceling the field to zero.
2) Since there are no charges inside a conductor (they all reside on the surface), it is logical that the charge density inside the conductor is also 0.
3) Surface Charge density = η = (q/A)
But electric field is given as
E = (-q/2πε₀r²)
q = -E (2πε₀r²)
η = (q/A) = -E (2πε₀r²)/A
For an elemental point on the surface,
A = 2πrl = 2πr²
So,
η = -E ε₀
Hope this Helps!!!
Answer;
North east
Explanation;
North East region of the country has diverse political trends.
No single political party gets majority votes in the North East region.
Every election the winning candidate lose the election which does not allow political analysts to guess the outcome of a forthcoming election. Many political parties share power in the North East.
We see a particular color because that color/wavelength of light bounces off the object and gets into our eyes. Every other color/wavelength is absorbed by the material. Usually the energy is converted to heat.
Evaporation <span>occurs when water molecules at the surface of a pool have enough kinetic energy that the attractive forces holding them to the liquid can be overcome.
In short, Your Answer would be Option C
Hope this helps!</span>