Previous Year Question
What is the S.I. unit of electrical resistance?
A.
Farad
B.
Ohm
C.
Volt
D.
Ampere
Correct Answer: B
Detailed Solution
The S.I. unit of electrical resistance is the ohm, represented by the symbol Ω. In the SI system maintained by the BIPM, the ohm is the derived unit of electrical resistance.
The ohm can be expressed in terms of volt and ampere as:
1 Ω = 1 V/A
Here, the volt (V) is the unit of potential difference and the ampere (A) is the unit of electric current.
Among the other options, farad is the unit of capacitance, volt of potential difference, and ampere of electric current.