If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

To log in and use all the features of Khan Academy, please enable JavaScript in your browser.

Main content

Course: Class 12 Physics (India) > Unit 1

Lesson 5: Electric field due to point charges

© 2024 Khan AcademyTerms of use Privacy Policy Cookie Notice

Superposition principle (intermediate)

Google Classroom

A point charge is located at each corner of a square, as shown below.

Point	Charge
$A$ ‍	$q$ ‍
$B$ ‍	$- q$ ‍
$C$ ‍	$- q$ ‍
$D$ ‍	$Q$ ‍

The force on the charge

Q

(at

D

) due to the charge,

q

, at

A

, has magnitude,

F

.

What is the magnitude of the net force on $Q$ ‍ due to all the charges?