The SI unit of electric field is
A{'text': 'coulomb (C), the SI unit of quantity of charge', 'label': 'A'}
B{'text': 'newton per coulomb, equivalent to volt per metre', 'label': 'B'}
C{'text': 'volt (V), the SI unit of electric potential', 'label': 'C'}
D{'text': 'joule (J), the SI unit of energy or work done', 'label': 'D'}
Answer & Solution
Correct answer: B. {'text': 'newton per coulomb, equivalent to volt per metre', 'label': 'B'}
1. Electric field is defined as force per unit charge.
2. Base SI unit: newton per coulomb (N/C).
3. Alternative form: volt per metre (V/m), same magnitude.
4. Both are equivalent because 1 V/m = 1 N/C.
_Source: NCERT Class 12 Physics, Ch 1 "Electric Charges and Fields", §1.6_
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