Chapter 24.2, Problem 33SSC

a.

To determine

The orientation of the magnetic field and the electric field for a proton.

Explanation of Solution

Introduction:

Under a magnetic field the direction of force on a moving charge is determined by Fleming’s right hand rule. In an electric field, the direction of force is collinear with the direction depending upon the charge.

In accordance with Fleming’s right-hand rule, if the thumb is directed towards the movement of the positive charge and middle finger points in the direction of the force pushing the charge, then the index finger points in the direction of the magnetic field.

Thus, as the protons (same as direction of current) move in a clockwise direction, to move them in a circular path, the magnetic field must point up at right angle to the velocity of the protons.

The electric field should be in a clockwise direction similar to the motion of the protons.

Conclusion:

As the protons move in a clockwise direction, to move them in a circular path the magnetic field must point up at a right angle to the velocity of the protons.

The electric field should be in a clockwise direction similar to the motion of the protons.

b.

To determine

The orientation of the magnetic field and the electric field for a negatively charge antiproton.

Explanation of Solution

Introduction:

Under a magnetic field the direction of force on a moving charge is determined by Fleming’s right hand rule. In an electric field the direction of force is collinear with the direction depending upon the charge.

In accordance with the Fleming’s right-hand rule,when the thumb is directed towards the movement of the positive charge and middle finger points towards the force pushing the charge, then the index finger points in the direction of the magnetic field.

Hence as the antiprotons are negatively charged move in an anticlockwise direction, to move them in a circular path the magnetic field must point up at a right angle to the velocity of the protons.

Conclusion:

Hence, as the antiprotons are negatively charged, they move in an anticlockwise direction.To move them in a circular path the magnetic field, must point up at a right angle to the velocity of the protons.