Q. 363.7( 3 Votes )

A point charge produces an electric field of magnitude 5 N C–1 at a distance of 40 cm from it. What is the magnitude of the charge?

Answer :

Electric field due to a point charge: E = 5 N C–1
Distance between the point charge and the point at which electric field is produced : r = 40 cm = 0.4 m
Formula used:

Electric field is given as:
E=kq r2
Here , k is a constant and k=
= 9× 109 Nm2C-2 . q is the point charge .
Substituting we get

Hence, magnitude of the charge is 8.89× 10-11 C.

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Superfast Revision of Potential & Potenial Energy (Theory + Interactive Quiz)47 mins
Check your knowledge of Electric Potential | Quiz45 mins
Relation between electric field and potential34 mins
Relation between Electric field & Potential45 mins
Interactive quiz on Relation between electric field and potential43 mins
Electric field inside cavity37 mins
Few Applications of Gauss's law54 mins
Test Your Knowledge of Electric Charge & Coulomb's Law47 mins
Electric potential inside solid and hollow sphere30 mins
Electric Field Lecture47 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses