alleryWhat is the SI unit of electrical resistance?
AOhm
BJoule
CWatt
DAmpere
Answer & Solution
Correct answer: A. Ohm
1. Resistance is the ratio of potential difference to current: $R = V/I$.
2. Its SI unit is the ohm, symbol $\Omega$.
3. Joule is energy, watt is power and ampere is current.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 4 Electricity "Electricity", p.62_
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