Cathode rays are moving between the poles of a magnet. due to the effe...
Since figure is not given, so we can provide the answer using some assumption.
Let us say cathode rays passed in the perpendicular direction to the magnetic field. And when charge particle enter the field in perpendicular direction then it trace the circular motion in the direction perpendicular to the both field and velocity of the charge.
Therefore cathode rays will get deflected in the perpendicular to the plane if paper.
hence option (4) is correct.
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Cathode rays are moving between the poles of a magnet. due to the effe...
Introduction:
When cathode rays pass between the poles of a magnet, they experience the effect of the magnetic field. This interaction between the magnetic field and the cathode rays leads to several observable effects.
Effect of the Magnetic Field on Cathode Rays:
1. Velocity of rays increases: The magnetic field exerts a force on the charged particles in the cathode rays. According to the Lorentz force law, this force is perpendicular to both the velocity of the particle and the magnetic field. As a result, the force changes the direction of motion of the charged particles, causing them to move in a curved path. Due to this change in direction, the velocity of the cathode rays increases.
2. Velocity of rays decreases: The velocity of the cathode rays does not decrease due to the magnetic field. On the contrary, the velocity may increase as mentioned above.
3. Rays deflected towards south pole: The direction of deflection of the cathode rays depends on the polarity of the magnet. If the south pole of the magnet is facing the cathode rays, the force exerted by the magnetic field will cause the rays to deflect towards the south pole.
4. Rays deflected in upward direction and perpendicular to the plane of the paper: The deflection of the cathode rays is perpendicular to both the magnetic field and the direction of motion of the rays. Thus, if the cathode rays are initially moving towards or away from the plane of the paper, they will experience a force that deflects them in an upward direction, perpendicular to the plane of the paper.
Conclusion:
When cathode rays pass between the poles of a magnet, they are affected by the magnetic field. The velocity of the rays may increase, and the direction of deflection depends on the polarity of the magnet. If the cathode rays are initially moving towards or away from the plane of the paper, they will be deflected in an upward direction, perpendicular to the plane of the paper.