# Electric and Magnetic Fields

1. Jun 5, 2005

### harhar

If a charged particle moves at a constant velocity in a straight line through a region of space, is the electric field and/or magnetic field in the region zero?

2. Jun 5, 2005

### HallsofIvy

If a charged particle moves at constant velocity, in a straight line, what is its acceleration? What, then is the force on it? What does that tell you about the electric and magnetic forces and fields?

3. Jun 5, 2005

### harhar

So, no forces?

4. Jun 5, 2005

### harhar

wait, according to the equation F=qvBsin theta .....can't there still be a magnetic force?

5. Jun 5, 2005

### harhar

oh wait nvm i got it lol

6. Jun 5, 2005

### seiferseph

what is another condition for constant velocity or it going in the straight line. if theres an electric field pulling it up and a magnetic field pulling it down...

7. Jun 5, 2005

### dextercioby

To sum it up,either both are absent,or present,but with perfectly balanced effects adding (as vectors) to zero.

Daniel.