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The unit of electric field intensity is

1. Coulomb/Newton
2. Coulomb/Joule
3. Volt/metre
4. Newton/metre

Correct answer: Volt/metre

Solution

Electric field intensity is defined as force per unit charge, so its unit is N/C. It is also equal to the negative potential gradient, giving the equivalent unit V/m. Among the options, the correct unit is Volt/metre.

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