Published by:
CGP EDU Academic Team
Published on: September 12, 2026
A cube of side 'a' has point charges +Q located at each of its vertices except at the origin where the charge is - Q. The electric field at the center of cube is:
Text Solution
Verified by ExpertsThe correct answer is:
C
JEE Main 2021
If only +Q charges are placed at the corners of cube of side a then electric field at the center of the cube will be zero.
But in the given condition one (–Q) is placed at one corner of cube so here
and 
(So it will cancel out each other so electric field at center is due to Q 4 and Q 7
Here electric field at center 
As, 
In vector form 
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
Concentric metallic hollow spheres of radii R and 4R hold charges Q 1 and Q 2 respectively. Given t…
Two charged thin infinite plane sheets of uniform surface charge density and where intersect at …
A two point charges 4q and -q are fixed on the x axis at and respectively. If a third point charg…
Charges Q 1 and Q 2 are at points A and B of right angle triangle OAB (see figure). The resultant …
Two identical electric point dipoles have dipole moments and and are held on the x axis at distan…
Consider the force F on a charge 'q' due to a uniformly charged spherical shell of radius R carryin…