CBSE Class 10 Science 2020 Outside Delhi Set 1

Question : 14 of 30

Marks: +1, -0

Assertion (A): Alloys are commonly used in electrical heating devices like electric iron and heater.
Reason (R) : Resistivity of an alloy is generally higher than that of its constituent metals but the alloys have low melting points than their constituent metals.

Both (A) and (R) are true and (R) is correct explanation of the assertion.
Both (A) and (R) are true but (R) is not the correct explanation of the assertion.
(A) is true but (R) is false.
(A) is false but (R) is true.

Solution:

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