Question

SI unit of electric field is: ____.

• A. Coulomb
• B. Volt
• C. Newton/Coulomb
• D. Joule

Hint:

If you forget the unit, just remember the definition: "Force per Charge." The name of the unit will naturally follow!

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
The electric field ($E$) at a point is defined as the electrostatic force ($F$) experienced by a unit positive test charge ($q$) placed at that point.

Step 2: Key Formula or Approach:
\[ E = \frac{F}{q} \]

Step 3: Detailed Explanation:
1. The SI unit of Force ($F$) is the Newton (N). 2. The SI unit of Charge ($q$) is the Coulomb (C). 3. Therefore, the unit of Electric Field ($E$) is: \[ \text{Unit of } E = \frac{\text{Newton}}{\text{Coulomb}} = \text{N/C} \] (Note: Another common unit for electric field is Volts per meter ($V/m$), but it is not listed among the options).

Step 4: Final Answer:
The SI unit of electric field is Newton/Coulomb.