SI unit of permittivity of free space is
Correct answer: D. N-1 m-2C²
- A. Nm2C2
- B. N-1 mC²
- C. NmC¹
- D. N-1 m-2C²
Explanation
Electrical force is given by F=q1q2/(4 πϵo r2)So, ϵo = q1q2/(4 πF r2).Here, q1 and q2 are charges, r is the distance between then and ϵo is permittivity of free spaceWhen, put the units for these, the unit of becomes ϵo N-1 m-2C2
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Electrostatics describes forces between charges through Coulomb's law, electric fields and field intensity, then uses electric potential to measure energy per unit charge. Capacitors store charge and electrical energy, with capacitance depending on geometry and dielectric material, not simply on the amount of charge present.
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