Question

Potential difference between the two given points 5cm is 20v . What is value of electric field?

Answer 1

$\textbf{Hey there}$!!

$\textbf{Answer}$:

Here, dv = 20 v

dr = 5 cm

= 0.05 m

Now, Acc. to the formulla of Gradient of Potential :

E = $\frac{-dv}{dr}$

E = $\frac{-20}{0.05}$

E = - 400 v $m^{-1}$

The Negative sign indicates that the direction of the electric field is always in the direction of decrease of electric potential.

Answer 2

Here, dV = 20 V, dr = 5cm = 0.05m Now, E = - dV/dr = 20/0.05 = -400V m-1