The picture below shows four square regions. Each of the four regions may have i

Question

The picture below shows four square regions. Each of the four regions may have its own uniform magnetic field. If there is a uniform magnetic field in a region, the field is directed either into or out of the screen (or the page, if you printed your assignment out on paper). Two charged particles pass through this region. Particle 1 has a positive charge. The path of particle 1 is a quarter-circle in region A, a half-circle in region D, another quarter-circle in region A, and a quarter-circle in region B. The path of particle 2 is a straight line in region C, and a quarter circle in region D. What can you say about the direction of the magnetic field in each of the four regions? (Select all that apply.) The magnetic field is directed into the screen in region A. The magnetic field is directed out of the screen in region A. There is no magnetic field in region A. The magnetic field is directed into the screen in region B. The magnetic field is directed out of the screen in region B. There is no magnetic field in region B. The magnetic field is directed into the screen in region C. The magnetic field is directed out of the screen in region C. There is no magnetic field in region C. The magnetic field is directed into the screen in region D. The magnetic field is directed out of the screen in region D. There is no magnetic field in region D.

Explanation / Answer

Here apply right hand rule i.e

Stretch humb,forefinger,and middle finger in mutual perpendicular directions.

THUMB: Force on positive charge

MIDDLE FINGER: Direction of magnetic field

FOREFINGER: The direction velocity of the charged particle.

(a).Direction of magnetic field in each of four regions are

THE MAGNETIC FIELD IS DIRECTED OUT OF THE SCRENN IN REGION A

THE MAGNETIC FIELD IS DIRECTED IN TO THE SCRENN IN REGION B

THERE IS NO MAGNETIC FIELD IN REGION C

THE MAGNETIC FIELD IS DIRECTED IN TO THE SCREEN IN REGION D

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