Which of the following property of a proton can change while it moves freely in a magnetic field?
NCERT Solution for Class 10 Science Chapter 13
Magnetic Effects of Electric Current
NCERT Books for Session 2022-2023
CBSE Board and UP Board
Intext Questions
Page No-231
Questions No-1
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(c) Velocity and (d) Momentum
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(c) and (d)
When a proton enters an area of magnetic field, it experiences a magnetic force. As a result of the force, the path of the proton becomes circular. Therefore, its velocity and momentum change.
(c) and (d), i.e. velocity and mass of proton change when it enters a magnetic field. When a proton enters a magnetic field it starts moving on a circular path. Because of its movement along a circular path it attains angular momentum. We know that momentum is a product of mass and velocity.
When a proton moves freely in a magnetic field, the property that can change is its velocity. The correct answers are:
(c) velocity
(d) momentum
The mass of a proton remains constant, and the speed can also remain constant if the magnitude of the velocity remains the same. However, the direction of the velocity can change, leading to a change in momentum, which is a vector quantity dependent on both magnitude and direction. Therefore, both velocity and momentum can change when a proton moves freely in a magnetic field.