First slide

Electric field

Question

Two charges $q_{1} and q_{2}$ are kept on x-axis and electric field at different points on x-axis is plotted against x. Choose correct statement about nature and magnitude of $q_{1} and q_{2}$
.

Difficult

A

$q_{1} + ve, q_{2} - ve; |q_{1}| > |q_{2}|$
B

$q_{1} + ve, q_{2} - ve; |q_{1}| < |q_{2}|$
C

$q_{1} - ve, q_{2} + ve; |q_{1}| > |q_{2}|$
D

$q_{1} - ve, q_{2} + ve; |q_{1}| < |q_{2}|$

Solution

From the directions of fields from graph, it is clear that $q_{1}$ is negative and $q_{2}$ is positive.
Now, since electric field is zero to the right of $q_{2}$ , hence $q_{2}$ should be smaller in magnitude.

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