(a) What is the standard colour code followed for (i) live (ii) neutral and (iii) earth wires used in electric circuits? (b) Which part of an electric appliance is earthed and why?
Answers
Answered by
2
Answer:
Explanation:
Electric field at A is different from field at B because, E=
r
2
K
we know that conductor is equipotential surface, so potential will be same at A and B.
As charge density ,σ∝
r
1
, then charge density is different at A and B.
Using Gauss's law, flux through the surface of the cavity, ϕ=
ϵ
0
q
enclosed
=
ϵ
0
q
Ans: (C),(D)
Answer By
Answered by
10
Answer:
LIVE - Red colour [ now brown ]
Neutral - Black [ now blue ]
Earth - Green [ now yellow&green ]
Explanation:
The outer metallic case of the appliance is earthed as it is used to prevent electrocution of people handling the device.
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