Question

What is the unit of measure for electrical resistance?

• A. Volt
• B. Ampere
• C. Ohm
• D. Watt

Hint:

{Ohm (\(\Omega\)) is the SI unit of electrical resistance}, defined using Ohm’s Law \(V = IR\).

Answer 1

The Correct Option is C

Concept: Electrical resistance is the property of a material that opposes the flow of electric current through it. The SI unit of electrical resistance is the Ohm, represented by the symbol \( \Omega \). Resistance is related to voltage and current through Ohm’s Law: \[ V = IR \] where:

• \(V\) = Voltage (Volts)
• \(I\) = Current (Amperes)
• \(R\) = Resistance (Ohms)

Step 1: Identify the SI unit for resistance.
The standard SI unit used to measure resistance is the Ohm (\(\Omega\)).
Step 2: Eliminate other options.

• Volt measures electrical potential difference.
• Ampere measures electric current.
• Watt measures electrical power.

Therefore, the correct unit for electrical resistance is the Ohm.