# Physics

posted by .

1)The direction of the force on doubly ionized helium atoms(alpha particles)moving at right angles to a magnetic field is opposite to the direction of the force given by the third right-hand rule.

true.

2)The electromotive force is a force that makes charges flow from a point of higher potential to lower potential.

false. from low to high

• Physics -

I have no idea on the first. THe term third right-hand rule must be unique to your text.

On the second, it depends on what kind of charges you are discussing: positive, or negative. Wouldn't that matter?

## Similar Questions

1. ### Physics

1)A current-carrying conductor is kept at right angles to the direction of a magnetic field. What happens to the force acting on the wire if the strength of the magnetic field doubles?
2. ### Physics

1)When does a magnetic field induce maximum EMF in a wire moving with a constant velocity?
3. ### physics

When does a magnetic field induce maximum EMF in a wire moving with a constant velocity?
4. ### Physics!!!

When does a magnetic field induce maximum EMF in a wire moving with a constant velocity?
5. ### Physics

The polarity of an electromagnet can be determined using the second right-hand rule. A. True B. False Is it B?
6. ### physics

What is the direction of the force acting on a current-carrying conductor lying in a magnetic field?
7. ### physics

Current passing through a conductor is increased from 10 A to 15 A. This decreases the strength of the magnetic field produced by the conductor. True The direction of the force on doubly ionized helium atoms (alpha particles) moving …
8. ### Physics

A proton, moving in negative y-direction in a magnetic field , experiences a force of magnitude F, acting in the negative x direction. a) What is the direction of the magnetic field producing force?
9. ### physics (Right Hand Rule Question)

A proton traveling due east in a region that contains only a magnetic field experiences a vertically upward force away from the surface of the earth. What is the direction of the magnetic field?
10. ### Physics

I need some help with a few multiple choice quadroons that I don't understand 1.EMF is best described as a(n) a. electric force. b. energy measure. c. charge flow rate. d. potential difference. 2. Which rule is used to find the direction …

More Similar Questions