Question

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Copper is used to make electrical wires.
Reason (R): Copper has a very low electrical resistance. In the light of the above statements, choose the most appropriate answer from the options given below:

• A. Both (A) and (R) are correct and (R) is the correct explanation of (A)
• B. Both (A) and (R) are correct but (R) is not the correct explanation of (A)
• C. (A) is correct but (R) is not correct
• D. (A) is not correct but (R) is correct

Hint:

Materials with low electrical resistance (like copper and silver) are good conductors and are commonly used for wiring. Always connect conductivity with resistance: lower resistance means better conduction.

Answer 1

The Correct Option is A

Concept: In Assertion–Reason questions, we evaluate:
• Whether the Assertion (A) is true or false.
• Whether the Reason (R) is true or false.
• Whether the Reason correctly explains the Assertion. In this question, the concept involves electrical conductivity and resistance of materials.

Step 1: Analyze Assertion (A). \[ \text{Copper is used to make electrical wires.} \] This statement is true. Copper is widely used in electrical wiring because:
• It allows electric current to pass through it very easily.
• It is ductile (can be drawn into thin wires).
• It is durable and relatively inexpensive compared to other highly conductive metals like silver.

Step 2: Analyze Reason (R). \[ \text{Copper has a very low electrical resistance.} \] This statement is also true. Electrical resistance is the opposition offered by a material to the flow of electric current. Copper has:
• Very low resistivity.
• High conductivity. This allows current to flow efficiently with minimal energy loss.

Step 3: Establish the relationship between (A) and (R). The reason directly explains the assertion:
• Because copper has low electrical resistance, it permits easy flow of current.
• Therefore, it is an ideal material for making electrical wires.

Step 4: Logical conclusion.
• Assertion (A) is true.
• Reason (R) is true.
• Reason (R) correctly explains Assertion (A).

Step 5: Final answer. \[ \boxed{\text{Both (A) and (R) are correct and (R) is the correct explanation of (A)}} \]