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  4. A particle of mass m and charge q is thrown from a point in space where uniform gravitational field electric field are present. The particle <img class=img-fluid question-image alt=Question src=https://cdn.tardigrade.in/q/nta/p-j9rktff8jnyt.png /> (1) may follow a straight line (2) may follow a circular path (3) may follow a parabolic path

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Q. A particle of mass $m$ and charge $q$ is thrown from a point in space where uniform gravitational field & electric field are present. The particle
Question
(1) may follow a straight line
(2) may follow a circular path
(3) may follow a parabolic path

NTA AbhyasNTA Abhyas 2020Electrostatic Potential and Capacitance

Solution:

When force due to the gravitation field is equal to force due to the electric field, the particle must follow a straight-line path with acceleration.
when force due to gravitation field is not equal to force due to the electric field, the particle will follow the path of a parabola,
Hence $1$ and $3$ both are correct