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  • A uniform magnetic field exists in the plane of paper pointing from left to right as shown in Figure 13.3. In the field an electron and a proton move as shown. The electron and the proton experience (a) forces both pointing into the plane of paper (b) for

A uniform magnetic field exists in the plane of paper pointing from left to right as shown in Figure 13.3. In the field an electron and a proton move as shown. The electron and the proton experience
(a) forces both pointing into the plane of paper
(b) forces both pointing out of the plane of paper
(c) forces pointing into the plane of paper and out of the plane of paper, respectively
(d) force pointing opposite and along the direction of the uniform magnetic field respectively
    

Answers (1)

Hence, the correct answer is option (a).
Solution:

- We know that the direction of current will be in the direction of positive charge flow. As the electron is coming downward, we can assume the corresponding current will be moving upward. Similarly, the motion of proton in an upward direction will cause a corresponding current in an upward direction.
- Hence both the particles will have corresponding current in the same direction which is upward. By using Fleming's left-hand rule we can say that force on the proton as well as electron will be in the direction of the plane of paper.

 

 

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