Question

26. i) Which wire is made of a mixture of
substance and has a specific melting
point?
ii) What are substances which have high
resistance and through which current
cannot flow? *​

Answer 1

Answer:

1. fuse wire

alloys

hope it helps

Answer 2

Answer:

26. i) Which wire is made of a mixture of  substance and has a specific melting  point?

- Determining the melting point of a compound is one way to test if the substance is pure. A pure substance generally has a melting range (the difference between the temperature where the sample starts to melt and the temperature where melting is complete) of one or two degrees. Impurities tend to depress and broaden the melting range so the purified sample should have a higher and smaller melting range than the original, impure sample.

ii) What are substances which have high  resistance and through which current  cannot flow? *​

- In a conductor, electric current can flow freely, in an insulator it cannot. Metals such as copper typify conductors, while most non-metallic solids are said to be good insulators, having extremely high resistance to the flow of charge through them.