How does the colour code of wires in a cable help in house wiring ?

Three insulated wires in a cable

What is the colour code for the insulation on the earth wire

What is the colour code for the insulation on the earth wire ?

What is the colour code for the insulation on the earth wire?

What is the colour code for the insulation on the neutral

Name the colour code of the wire which is r connected to switch for the appliance

State one advantage of using the main switch in house wiring.

How does bile help in the digestion of fats?

How does the resistance of a wire depend on its radius? Explain your answer.

The cable of a uniformly loaded suspension bridge hangs in the form of a parabola. The roadway which is horizontal and 100m long is supported by vertical wires attached to the cable, the longest wire being 30m and the shortest being 6m. Find the length of the supporting wire attached to the roadway 18m from the middle.