Is it true that solder is used in joining metals for electrical work?

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True

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answer is A.

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Detailed Solution

The above statement is true.
When a metal is mixed with another metal or non-metal to prepare a homogeneous mixture, it is called an alloy. Solder is an alloy. It is a mixture of lead (Pb) and tin (Sn). Soldering is a joining process that uses solder to join various metals together. Many different alloys of soldering filler materials are available for various applications. The eutectic alloy of 63% tin and 37% lead has been the alloy of choice in electronics assembly. The alloy solder has a low melting point.

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