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# The Motion of a Charge Particle in a Magnetic and Electric Field

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A positive ion with charge 4.8 x 10(-19) C is traveling at a speed of 3 x 10(7) ms(-1) above the earth's atmosphere from East to West along the equator. The earth's magnetic field runs North-South.

1) Draw a sketch showing clearly the direction of motion of the charge, the lines of magnetic force and the direction of the magnetic force on the ion.

2) Calculate the magnetic force if the earth's field is B= 1.2 x 10(-4) T

3) What would be the radius of the particles motion if the magnetic force remained constant ( mass of the ion = 6.7 x 10(-26) kg )

4) What electric field in a particle detector would keep the ion moving in a straight line?

https://brainmass.com/physics/electricity-magnetism/motion-charge-particle-magnetic-electric-field-57505

#### Solution Preview

A positive ion with charge 4.8 x 10(-19) C is travelling at a speed of 3 x 10(7) ms(-1) above the earth's atmosphere from East to West along the equator. The earth's magnetic field runs North-South.
1) Draw a sketch showing clearly the direction of motion of the charge, the lines of magnetic force and the direction of the magnetic force on the ion.

The direction of the force acting on a moving charge due to magnetic field is given by Fleming's left hand rule.

Left hand rule: If the forefinger, middle finger and ...

#### Solution Summary

A charge particle moving in Magnetic and electric field, for parts for different quantities are solved.

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