Calculate the area of cross section of wire of length 2m resistance 25ohm and resistivity of material of wire 1.84x10power-8
Answers
Given:
- Length of wire = l = 2 m
- Resistance = R = 25Ω
- Resistivity of material = ρ = 1.84 × 10⁻⁸
To find:
Area of cross section = ?
Solution:
For finding the area of cross section of the wire, we apply the formula which connects both Resistance and Resistivity.
R = ρl ÷ A
Plug in the given values and find out the value of A
25 = (1.84 × 10⁻⁸ × 2) ÷ A
⇒ 25 = (3.68 × 10⁻⁸) ÷ A
⇒ 25 ÷ (3.68 × 10⁻⁸) = A
⇒ Area = 6.79 × 10⁸
∴ 『Area = 6.79 × 10⁸ m²』
KNOW MORE:
- Resistance does not depend on the nature of material but Resistivity depends on nature of material.
Given:
Length of wire = l = 2 m
Resistance = R = 25Ω
Resistivity of material = ρ = 1.84 × 10⁻⁸
To find:
Area of cross section = ?
Solution:
For finding the area of cross section of the wire, we apply the formula which connects both Resistance and Resistivity.
R = ρl ÷ A
Plug in the given values and find out the value of A
25 = (1.84 × 10⁻⁸ × 2) ÷ A
⇒ 25 = (3.68 × 10⁻⁸) ÷ A
⇒ 25 ÷ (3.68 × 10⁻⁸) = A
⇒ Area = 6.79 × 10⁸
∴ 『Area = 6.79 × 10⁸ m²』
KNOW MORE:
Resistance does not depend on the nature of material but Resistivity depends on nature of material