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 then their
constituent metals.
Options
(a) Both A and R are true and R is correct explanation of the assertion.
(b) Both A and R are true but R is not the correct explanation of the assertion.
(c) A is true but R is false.
(d) A is false but R is true
Option B or Option A and why with full explanation
Answers
Answer:
Mark me the brainiliest if you think so
Explanation:
A) Both A an R are true and R is the correct explanation of the assertion
Alloys are used in electrical heating devices rather than pure metals because the resistivity of an alloy is more than the resistivity of a pure metal. Moreover alloy does not burn (or oxidize) easily even at higher temperature A an R are true and R is the correct explanation of the assertion
Answer:
(A) Both A and R are true and R is correct explanation of the assertion.
Explanation:
An alloy is combination of a metal and a non metal. So it has partial characteristics of metal and non metal. Being analloy the ions it it are randomly arranged
It does not have a specific arrangement of ions. Hence the flow of electrons in this is more.
This feature of alloy leads to increase in resistivity due to free crystal lattice.
We know that metals have high melting point but an alloy has low melting point beacause the presence of a non metal in it behaves as an impurity and restricts in raising to high melting point.
Due to high melting point the it takes a lot of current to melt and leads in slow movement of electrons which makes the device less efficient. Therefore electronic device requires the metal of low melting point. An alloy plays the best role in the elctronic device like electric iron and heater.