Question

15)

Assertion - Fuse wire is made up of an alloy constituted by lead and tin made by 1:1 ratio by mass

Reason - Both lead and tin have comparatively lower melting point than other metals.

• A. Both (A) and (R) are true and (R) is the correct reason for (A)
• B. Both (A) and (R) are true but (R) is not the correct explanation for (A)
• C. (A) is true but (R) is false
• D. (A) is false but (R) is true.

Answer 1

The correct option is A

Both (A) and (R) are true and (R) is the correct reason for (A)

Explanation for assertion statement -

Fuse is a protective device used to break the circuit when the current flows above threshold value. The fuse wire is made of lead and tin in the ratio 1:1.

Explanation for the reason statement -

Circuit breaks down on crossing threshold value of current by melting down. For making fuse, wires of components having low melting point are preferred. The melting point of lead and tin is low, hence it is preferable for making fuse.

Hence ,Both (A) and (R) are true and (R) is the correct reason for (A)