Solder used for welding electrical wires is an alloy consisting of

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ISRO URSC Technical Assistant Mechanical 24 March 2019 Official Paper
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  1. tin, antimony and copper
  2. tin and copper
  3. lead and zinc
  4. tin and lead

Answer (Detailed Solution Below)

Option 4 : tin and lead
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Detailed Solution

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Explanation:

  • Electrical solder is an alloy of tin (Sn) and lead (Pb).
  • Tin-Lead solders is the largest single group and the most widely used of the soldering alloys.
  • Soldering is a process in which two or more metal items are joined together by melting and flowing a filler metal into the joint.
  • The filler metal has a relatively low melting point.
  • A solder is a fusible metal alloy with a melting point or melting range of 90 to 450°C.
  • The solder is melted in the process of soldering to join metallic surfaces.
  • It is especially useful in electronics and plumbing.
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