A particle moving in the xy plane experiences a velocity dependent force {{F^{\to}}}={k}({v}_{{y}} {{i^{\^}}}+{v}_{{x}} {{j^{\^}}}), where {v}_{{x}} and {v}_{{y}} are the {x} and {y} components of its velocity {{v^{\to}}}. If \overrightarrow{{a}} Ls the acceleration of the particle, then which of the following statements is true for the particle ? [6 Sep 2020 Shift 2]

Correct Answer is : quantity →v×→a is constant in lime.

quantity {{v^{\to}}} .\overrightarrow{{a}} is constant in time.

kinetic energy of particle is constant in time.

quantity \overrightarrow{{v}}\times \overrightarrow{{a}} is constant in lime.

{{F^{\to}}} arises due to a magnetic field.

JEE Mains 06-Sep-2020 Shift 2 Solved Paper

Section: Physics

Question : 6 of 75

Marks: +1, -0

A particle moving in the xy plane experiences a velocity dependent force

→

=k(vy

+vx

), where vx and vy are the x and y components of its velocity

→

. If

→

Ls the acceleration of the particle, then which of the following statements is true for the particle ?

[6 Sep 2020 Shift 2]

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