Recent content by boiteporte

Sorry for my previous reply. I understand now. I have E=(vyBz,0,-vyBx) and B=(Bx,By,Bz). So, their dot products is vyBzBx+0-vyBxBz=0. So, they are perpendicular. Is this correct now?

Two vectors are perpendicular if their dot products equals 0. But, I still don't see where this is going...

Homework Statement An electron is traveling through a magnetic field B=(Bx, By, Bz). Find an expressions for the electric field E required to keep the electron's velocity constant at v=(0,vy,0). Hence, show that E and B are perpendicular.Homework Equations F=q(v cross B) F=qEThe Attempt at a...

Ok, The answer should be 0.64 J. I got the brackets wrong. Is this correct now?

I think I am almost there. The final answer is q*delta V. So, it is -10*10^-6*-63554.76. So, this equals 6.355*10^-11 J. Is this correct?

The potential at infinity is defined to be 0, right? And the potential at the current location is 63554.76 V is it not? So, is the change in potential -63554.76 V??

Sorry, I forgot to put the unit. it is the Joule (J) and I got the numerical value by using Q=10 uC and V=V1 +V2 +V3 (the three potentials added together). So, the net potential is 63554.76 V and so qV= -10*10^-6*63554.76 which gives this answer. The sign is negative because q is negative. Is...

Homework Statement Four charges are placed at the corners of a square of side length a, as follows : -Q on the top left corner, +Q on the top right corner, -Q on the bottom left corner and +Q on the bottom right corner. Determine the electric field at the centre of the square and determine...