Question

good morning...

how does the resistivity of a
1* metallic wire
2* semiconductor
3* an alloy such as constantan
depends on the temperature ..

friends please ans this

Answer 1

if the temperature of wire is increased then its resistivity will also increase therefore this is answer to your question
alloys are used for making heating elements as iron toaster
as they do not go under oxidation even at high temperature resistivity of alloys are greater than metals

Answer 2

Answer:

What problems are faced cotton textile industry ?

• Machinery is obsolete.It needs to be upgraded in weaving and processing sectors.

• There is erratic power supply and this industry requires a good power supply for its growth.
• There is a stiff competition among synthetic fibre industry because synthetic fibre is available at cheap rates.