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Samveel Ansari posted an Question
September 07, 2020 • 04:28 am
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30 points
30 points
- IIT JAM
- Physics (PH)
Why the magnitude of electric field is coming different for the two methods!!!................plz check it and let me know where am i wrong????
why the magnitude of electric field is coming different for the two methods!!!................plz check it and let me know where am i wrong????
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Somnath Best Answer
Here you are doing wrong in finding the magnitude in the second part. Electric field is a vector quantity you can not just add the magnitude of the vector to get the total magnitude. You have to consider the direction also as you have done in the first part. For example let two forces are acting on a particle, one along x axis that is 3i and another along y axis that is 4j. Now what is the magnitude of the net force acting on the particle? Is it (3+4)=7N? No you can not just add the magnitude part like scalar. Here the net magnitude is √(3^2 + 4^2)= 5N and it is acting along 45 degree with the x axis. Hope you have understand.