Recent content by bb.minhtri

Yeah it turns out very complicated when thought of thoroughly... Since this was only one of 50 in 2 hours, I think there were some assumptions that were missed:( Anw, thank you guys so much for help :)

In my exam, this comes as a Multiple Choice Question, the 5 answers are pi * m / BQ multiplied by some constants that i don't remember. I think the problem setter's answer must be that collision really happens, but how it is affected by electric force, remains so complicated :(

But if one particle goes uncharged, its path is not affected by any force, hence it will never collide again?

I think one is charged -2Q, and that the mother particle is neutral, hence the other must be charged 2Q, is that right?

Thank you guys so much for fast replies... This question comes in an University Entrance Exam and I am not allowed to bring the statement home :( I can try to state it more clearly, but when I did it in the Exam, I was also worried about the Electric Force between the two: "A stable-uncharged...

When I settle down and draw it out, it seems that they collide after just half a period, cause they both go with the same radii...

Homework Statement A stable uncharged particle is break into 2 parts of mass m, one of which is charged -2Q. The two parts then go in the direction perpendicular to a uniform magnetic field B. After what time will the particles collide? Homework Equations The Attempt at a Solution I suppose...

Thanks. I think I can get on with that explanation:D The electric field change due to charge movement.

Creating Magnetic Field Homework Statement Which of the following that creates a magnetic field? A. A moving charge B. An electric field that changes with time. C. Both of them. Homework Equations The Attempt at a Solution A is definitely correct, I wonder if B is correct as...

The second one works ^^ Thank you very much. Your explanation is very clear:D

Homework Statement The iterative method is used to find the approximate root of the equation x3 + x - 1000 = 0 in [9, 10]. What is the suitable iterative function? Homework Equations The Attempt at a Solution How to find the iterative function and is there any conditions for one? Thanks for...

I get it, it's a negative-charge carrier. Sorry gneill, I can't believe I miss your post... Thank you both so much for helping!

Thanks, Sammy:D I thought about that formula earlier and there's definitely some force that push the conductor to the front(or to the back). But I still can not figure out its relation with this part It is observed that there are positive charge on the front of the conductor and negative charge...

"An electric conductor carrying electric current from left to right is placed in a downward magnetic field. It is observed that there are positive charge on the front of the conductor and negative charge a the back. If the electric current is reverse, flowing from right to left, then the...