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  4. The figure gives the electric potential V as a function of distance through four regions on x-axis. Which of the following is true for the magnitude of the electric field E in these regions?

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Q. The figure gives the electric potential V as a function of distance through four regions on x-axis. Which of the following is true for the magnitude of the electric field E in these regions?Physics Question Image

KCETKCET 2019Electrostatic Potential and Capacitance

Solution:

In region A, V = constant $\Rightarrow E_{A}=0$
In region B, $E_{B}=\frac{4-2}{2}=1 vm^{-1}$
In region C, V = constant $E_{c}=0$
In Region D, $E_{D}=\frac{4-2}{1}=2 \, vm^{-1} $
$Here\, E_{A}=E_{c} and \, E_{c} and \, E_{B} <\, E_{D}$