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Given below are two statements, one is labelled as Assertion (A) and the other as Reason (R).
Assertion (A) : Generally an alloy of lead and tin is used as a material of the fuse wire.
Reason (R) : Alloy of lead and tin has a higher melting point than copper and aluminium.
Select the correct answer from the code given below :
Code :
Explanation
Assertion (A) is correct. A fuse wire is a safety device designed to protect electrical circuits from overcurrent. It is commonly made of an alloy of tin (Sn) and lead (Pb) because this combination provides high resistance and a low melting point.
Reason (R) is false. For a fuse to function effectively, it must melt and break the circuit when the current exceeds a safe limit. Consequently, the material used must have a melting point significantly lower than the conducting wires of the circuit. The melting point of a typical tin-lead solder/fuse alloy is approximately 183°C, whereas copper melts at about 1085°C and aluminium at approximately 660°C. Therefore, the alloy has a lower, not higher, melting point than copper and aluminium.
SIMILAR QUESTIONS
Given below are two statements one is labelled as Assertion (A) and the other as Reason (R).
Assertion (A) : Phytoplankton grow in abundance in the limnetic zone.
Reason (R) : Limnetic zone is open water zone.
Select the correct answer from the code given below :
Code :
Given below are two statements one is labelled as Assertion (A) and other as Reason (R) :
Assertion (A) : The government faces a tough time tackling the bottleneck inflation.
Reason (R) : The situation is due to deficiencies existing in the economy such as supply bottleneck and inefficient distribution.
Select the correct answer from the codes given below.
Codes :
Given below are two statements, one is labelled as Assertion (A) and the other as Reason (R).
Assertion (A) : The concept of Sustainable Development was popularised by the Brundtland Report.
Reason (R) : The Brundtland Report is also known as "The Limits to Growth".
Select the correct answer from the codes given below :
Given below are two statements, one is labelled as Assertion (A) and the other as Reason (R).
Assertion (A) : Chile is the leading producer of copper in the world.
Reason (R) : Andes Region of North Chile is enriched with the largest deposites of Porphyry copper.
Select the correct answer from the code given below :
Code :