Question
What are the units of electrical resistance?
Answer Options
- A) Siemens
- B) Mhos
- C) Ohms
- D) Coulombs
Correct Answer: C
Explanation
Electrical resistance is the property of a material or component to oppose or restrict the flow of electrical current, converting some of that electrical energy into heat. The standard unit of electrical resistance is the Ohm (\Omega).
This unit is central to Ohm’s Law (E = I \times R), which defines the fundamental relationship between voltage, current, and resistance in a DC circuit. Resistance values in amateur radio vary widely, from fractions of an Ohm (in power wires) to many thousands of Ohms (in resistors).
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