MediumChemistryHigh School (9–10)GeneralMetals and Non-metals › Properties of Metals and Non-metalsConceptualNumericalBoard Exam
Why is solder used to join electric wires? …
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
- Why is solder used to join electric wires?
- Why is stainless steel used for cutlery?
- What percentage of carat gold is gold? Pure gold is carat.
Need a reminder? The key ideaShow
An alloy is a mixture of a metal with other elements, melted together. Brass: copper and zinc. Bronze: copper and tin. Solder: lead and tin. Stainless steel: iron, chromium and nickel. Pure gold is carat; carat gold is gold. Mass of a part = total mass × its percentage ÷ .
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. (a) Solder has a low melting point, so it melts and joins the wires without melting them, and it conducts.
Step 2. (b) Stainless steel does not rust and is strong.
Step 3. (c) .
Answer: (c) .
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