Question

1. Distinguish between the terms electrical resistance and resistivity of conductor.

2. A copper wire of resistivity 1.63 x 10^-8π-m has cross-section area of 10.3 x 10^-4
cm. Calculate the length of the wire required to make a 20ohm coil.
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Answer 1

Answer:

hii

Explanation:

The resistance is the ratio of the length and cross-section area of the conductor, whereas the resistivity of the material is the ratio of the product of the resistance and area to the length of the conductor. The resistance is represented by the symbol R whereas the resistivity is represented by the symbol ρ.

Answer 2

Answer:

1. The resistance is the ratio of the length and cross-section area of the conductor, whereas the resistivity of the material is the ratio of the product of the resistance and area to the length of the conductor. The resistance is represented by the symbol R whereas the resistivity is represented by the symbol ρ.

2.