Chapter 24, Problem 61A

To determine

The way, the magnetic force on a charged particle in a synchrotron makes it move in a circle.

Explanation of Solution

Introduction:

Under a magnetic field, the direction of force on a moving charge can be known by Fleming’s right-hand rule.

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

In a synchrotron, the particle’s velocity is always at right angles to a magnetic field, a continuous force is exerted on the particle to move in a circle.

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.