What is the SI unit of electric field?
Answer
Newton per coulomb (N/C)
The correct answer is Newton per coulomb (N/C) — Insert the SI units: force in newtons (N) and charge in coulombs (C), yielding the unit .
Step-by-step solution
- Recognise that electric field is defined as the force per unit positive test charge: .
- Insert the SI units: force in newtons (N) and charge in coulombs (C), yielding the unit .
Common mistake: Confusing electric field with electric potential or voltage
Concept tested: SI unit of electric field
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