Singly ionized (one electron removed) atoms are accelerated and then pass through a velocity selector, going in the +x direction. The electric field is 155 V/m in this region and points upward (towards the top of the page) and the magnitude of the magnetic field is 31.5 mT. AFTER passing through the velocity selector, the positive ions enter a region with a magnetic field only, of magnitude 17.5 mT. (a) In the velocity selector, what is the direction of the 31.5 mT magnetic field? (b) What is the speed of the ions when they emerge from the velocity selector? (c) If the radius of the path of the ions in the second magnetic field, the 17.5 mT field, is 17.5cm, what is their mass?

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Magnetic Force

A magnetic force arises when a charged particle or a current-carrying conductor is placed in a magnetic field. It is created because of the movement of the charged particles.