Question

Two wires are of the same length,same radius but one of them if of copper and other is iron which will have more resistance​

Answer 1

Answer:

copper will have more resistance

Answer 2

Answer:

Iron will have more resistance.

Explaination:

• We know that Resistance is directly proportional to Resistivity because of the formula R = ρ l ÷ A

R ∝ ρ

• If the resistivity increases, the resistance also increases.
• Copper has a resistivity of 1.62 × 10⁻⁸ whereas Iron has a resistivity of 10 × 10⁻⁸.

So, iron has a higher resistivity and therefore higher resistance.

Know more:

★ Silver and copper are the best conductors of electricity because they have the least resistivity.

★ Diamond and dry paper are insulators and cannot conduct electricity because they have very high resistivity.