Question

The resistivity of two conductors ‘A’ and ‘B’ are 1.62 x 10−8 Ω m and

5.20 x 10−8 Ω m respectively. Which of them is used in :

(i) Transportation of electricity

(ii) The making of heating coils? Why?​

Answer 1

The correct answer is:

Explanation:

• Electrical resistivity is a fundamental physical property of a material that measures how strongly an object resists electric current.
• (i) Conductor A with 1.62 x 10−8 Ω m resistivity is used for the Transportation of Electricity as it's resistivity is less than Conductor B and will resist less electricity.
• (ii) Conductor B with resistivity is used in the making of the heating coils as it's resistivity is more than Conductor A so it will resist more electricity.

Answer 2

Answer:

Conductor A for transportation of current .

Conductor B for making heating coils .

Explanation:

i) For transportation of electricity conductor A with a resistivity of 1.62×10⁻⁸ Ωm is used because it has low resistance compared to conductor B.  Hence if resistance is low current passes more easily through it. S it can be used for transportation of electricity.

(ii) For making heating coils conductor B with a resistivity of 5.20 ×10⁻⁸Ωm is used as its resistance is high and current will face difficulty while passing through this conductor, hence heat will be produced.

So conductor B would be suitable for heating coils.