How is the magnitude of the electric field at a point defined?
AThe charge per unit force
BThe force per unit charge
CThe force per unit length
DThe charge per unit area
Answer & Solution
Correct answer: B. The force per unit charge
1. An electric field is a region of space in which a charge experiences a force.
2. The electric field at a point is defined as the force per unit charge.
3. This makes the field independent of how large the test charge happens to be.
4. The units that follow from this definition are newtons per coulomb.
_Source: Siyavula Physical Sciences Grade 11 (Everything Science, CC BY 4.0), Chapter 9: Electrostatics_
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