Question:
SI unit of electrical potential difference is
SI unit of electrical potential difference is
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It's important to know the SI units of basic electrical quantities:
- Charge: Coulomb (C)
- Current: Ampere (A)
- Voltage (Potential Difference): Volt (V)
- Resistance: Ohm (\( \Omega \))
- Power: Watt (W)
Updated On: Apr 30, 2025
- watt
- volt
- ampere
- ohm
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The Correct Option is B
Solution and Explanation
Step 1: Recall the definition of electrical potential difference.
Electrical potential difference (voltage) is the work done per unit charge to move a charge between two points in an electric field. Step 2: Identify the SI units of the related quantities.
Work (energy) is measured in Joules (J).
Electric charge is measured in Coulombs (C).
Step 3: Determine the SI unit of electrical potential difference.
Since potential difference \( V = \frac{W}{Q} \), the SI unit of potential difference is Joules per Coulomb (J/C). This unit is given a special name: Volt (V). \[ 1 \text{ Volt (V)} = 1 \text{ Joule per Coulomb (J/C)} \] Step 4: Analyze the given options. \begin{enumerate} \item Watt (W): This is the SI unit of power (energy per unit time). \item Volt (V): This is the SI unit of electrical potential difference. \item Ampere (A): This is the SI unit of electric current (charge per unit time). \item Ohm (\( \Omega \)): This is the SI unit of electrical resistance (voltage per unit current). \end{enumerate} Step 5: Identify the correct SI unit.
The SI unit of electrical potential difference is Volt.
Electrical potential difference (voltage) is the work done per unit charge to move a charge between two points in an electric field. Step 2: Identify the SI units of the related quantities.
Work (energy) is measured in Joules (J).
Electric charge is measured in Coulombs (C).
Step 3: Determine the SI unit of electrical potential difference.
Since potential difference \( V = \frac{W}{Q} \), the SI unit of potential difference is Joules per Coulomb (J/C). This unit is given a special name: Volt (V). \[ 1 \text{ Volt (V)} = 1 \text{ Joule per Coulomb (J/C)} \] Step 4: Analyze the given options. \begin{enumerate} \item Watt (W): This is the SI unit of power (energy per unit time). \item Volt (V): This is the SI unit of electrical potential difference. \item Ampere (A): This is the SI unit of electric current (charge per unit time). \item Ohm (\( \Omega \)): This is the SI unit of electrical resistance (voltage per unit current). \end{enumerate} Step 5: Identify the correct SI unit.
The SI unit of electrical potential difference is Volt.
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