What is called electric field intensity? Write its $SI$ unit.
(N/A) Electric field intensity at a point is defined as the electrostatic force experienced by a unit positive test charge placed at that point.
Mathematically,it is expressed as $\vec{E} = \frac{\vec{F}}{q_0}$,where $\vec{F}$ is the force on a test charge $q_0$.
The $SI$ unit of electric field intensity is $\text{Newton per Coulomb}$ $(N/C)$ or $\text{Volt per meter}$ $(V/m)$.
Mathematically,it is expressed as $\vec{E} = \frac{\vec{F}}{q_0}$,where $\vec{F}$ is the force on a test charge $q_0$.
The $SI$ unit of electric field intensity is $\text{Newton per Coulomb}$ $(N/C)$ or $\text{Volt per meter}$ $(V/m)$.
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$(b)$ If a negative test charge of magnitude $1.5 \times 10^{-9}\; C$ is placed at this point,what is the force experienced by the test charge?
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