Answer : (1) - Ohm CONCEPT: ● Electrical Resistance: The property of any conductor that opposes the flow of electric current through it is called resistance. ∘ It is denoted by R and the SI unit is the ohm (Ω). The resistance is given by: R = ρ
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Where ρ is resistivity, L is the length and A is the area of the cross-section. EXPLANATION: ● The SI unit of electrical resistance is Ohm (Ω) and it is the SI derived unit of electrical resistance, named after German physicist, Georg Simon Ohm.