Correct Answer - Option 4 : Capacitance
Resistance:
- The hindrance to the flow of current offered by a material is called electrical resistance. The SI unit of electrical resistance is the ohm (Ω).
- The resistance of a conducting wire is given by the equation:
\(R = ρ\frac{l}{A}\)
- Where R is the resistance, l is the length of the wire and A is the cross-sectional area of the material.
Reactance:
- Reactance (also known as electrical reactance) is defined as the opposition to the flow of current from a circuit element due to its inductance and capacitance.
- When an alternating current passes through the electric circuit or element, the phase, and amplitude of current will change. The reactance is used to compute this change in phase and magnitude of the current and voltage waveforms.
- The reactance is inductive if it releases energy in the form of a magnetic field. And the reactance is capacitive if it releases energy in the form of an electric field.
Hence the options 1, 2 & 3 have same unit Ohm.
Note: Capacitance is usually measured in Farad and microFarads.
