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________ is the physical property of an element or device that impedes the flow of current.


1. Resistance
2. Voltage
3. Power
4. Conductance

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Correct Answer - Option 1 : Resistance

Resistance:

It is the property of any conductor that opposes or impedes the flow of electric current through it and depends on the shape and size of the materials, temperature, and nature of the materials is called resistance.

It is denoted by R and the SI unit is the ohm (Ω).

The resistance is given by:

\(\Rightarrow R=\frac{\rho l}{A}\)

Where R = resistance , ρ = resistivity, l = length of the wire and A = cross-sectional area

  • Conductance is a property of a conductor that allows the flow of current through it.
  • Reluctance is a property of a conductor that opposes the passage of magnetic flux lines through it
  • Permeance is a property of a conductor that allows the passage of magnetic flux lines through it

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