Question

What is resistance?

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Answer 1

Resistance

It is the property of a conductor to resist the flow of charges through it. Its S.I unit is ohm (Ω).

R = V/I

Where,

• R = Resistance
• V = voltage
• I = current.

Factors on which the resistance of a conductor depends:

• Resistance depends on its length (L)
• Resistance depends on its cross sectional area (A)
• Resistance depends on the nature of material

$\sf{R\propto \dfrac{L}{A}}$

$\sf{R=\rho \dfrac{L}{A}}$

• Where "ρ" (rho) is proportionally constant known as resistivity of the material of conductor.

Answer 2

Answer:

Resistance is a measure of the opposition to current flow in an electrical circuit. Resistance is measured in ohms, symbolized by the Greek letter omega (Ω).