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Which one of the following is not correct about Lorentz force?

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Important Questions on Moving Charges and Magnetism

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CUET (UG)
IMPORTANT
Achieve CUET (UG) Physics Practice Book>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 16
An electron is travelling along the x-direction. It encounters a magnetic field in the y-direction. Its subsequent motion will be
EASY
CUET (UG)
IMPORTANT
Achieve CUET (UG) Physics Practice Book>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 17
What uniform magnetic field applied perpendicular to a beam of electrons moving at 1.3×106 ms-1 , is required to make the electrons travel in a circular arc of radius 0.35 m?
MEDIUM
CUET (UG)
IMPORTANT
Achieve CUET (UG) Physics Practice Book>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 18
If an electron and a proton having the same momentum enter perpendicular to a magnetic field, then_____.
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CUET (UG)
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Achieve CUET (UG) Physics Practice Book>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 19
A charged particle of mass m and charge q travels on a circular path of radius r that is perpendicular to a magnetic field B→. The time taken by the particle to complete one revolution is:
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CUET (UG)
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Achieve CUET (UG) Physics Practice Book>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 20
A proton, a deuteron and an alpha particle are accelerated through same potential difference and then they enter a normal uniform magnetic field, the ratio of their kinetic energies will be
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CUET (UG)
IMPORTANT
Achieve CUET (UG) Physics Practice Book>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 21
A charged particle enters a magnetic field at right angles to the field. The field exists for a length equal to 1.5 times the radius of circular path of particle. The particle will be deviated from its path by
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CUET (UG)
IMPORTANT
Achieve CUET (UG) Physics Practice Book>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 22
A particle of mass m and charge q is incident on XZ plane with velocity v in a direction making angle θ with a uniform magnetic field applied along X -axis. The nature of motion performed by the particle is
HARD
CUET (UG)
IMPORTANT
Achieve CUET (UG) Physics Practice Book>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 23
A charged particle enters a uniform magnetic field with velocity vector at an angle of 45o with the magnetic field. The pitch of the helical path followed by the particle is p . The radius of the helix will be