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Wednesday, 14 February 2018

'सोल्डर' किस धातु का मिश्रण है?

  By GK Planet Team       Wednesday, 14 February 2018
Q. 'सोल्डर' किस धातु का मिश्रण है?

A. कॉपर और जिंक
B. टिन और जिंक
C. जिंक और लेड
D. टिन और लेड

Answer: टिन और लेड

टाँका या सोल्डर (Solder) एक गलनीय मिश्रधातु है। इसका उपयोग टाँका लगाने तथा धातु के टुकड़ों को जोड़ने के काम आती है।
Tin-lead (Sn-Pb) solders, also called soft solders, are commercially available with tin concentrations between 5% and 70% by weight. The greater the tin concentration, the greater the solder’s tensile and shear strengths. Historically, lead has been widely believed to mitigate the formation of tin whiskers, though the precise mechanism for this is unknown. Today, many techniques are used to mitigate the problem, including changes to the annealing process (heating and cooling), addition of elements like copper and nickel, and the inclusion of conformal coatings. Alloys commonly used for electrical soldering are 60/40 Sn-Pb, which melts at 188 °C (370 °F), and 63/37 Sn-Pb used principally in electrical/electronic work. 63/37 is a eutectic alloy of these metals
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