Question

A wire of length l made of material resistivity ρ is cut into two equal parts. The resistivity of the two parts are equal to, (a) ρ (b) ρ2 (c) 2 ρ (d) 4 ρ​

Answer 1

Answer:

The answer is p/2

Explanation:

As length is cut into half without changing the area of cross section.....the resistence will become half i . e. P/2

Answer 2

Resistivity

• Resistivity is defined as the electrical resistance of a conductor of unit cross-sectional area and unit length.
• It only depends on the nature and temperature of the material.
• It does not depends on the shape or size that is cross-sectional area or length of the wire or material.

The given wire is made up of material whose resistivity is ρ, and it is of length l. It then cuts into two equal parts. The resistivity of the two parts are equal to ρ, because it doesn't depends on length.