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Magnetics question

2025 · 3 Apr · Shift 2 · Q70

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JEE Main
Physics
Magnetics
2025 · 3 Apr · Shift 2 · Q70

Magnetics question

2025 · 3 Apr · Shift 2 · Q70

JEE MainPhysicsMagneticsMCQ+4 / −1

Given below are two statements: one is labelled as

\mathbf{A s s e r t i o n} \mathbf{A}

and the other is labelled as Reason

\mathbf{R}

Assertion A : If Oxygen ion

\left(\mathrm{O}^{-2}\right)

and Hydrogen ion

\left(\mathrm{H}^{+}\right)

enter normal to the magnetic field with equal momentum, then the path of

\mathrm{O}^{-2}

ion has a smaller curvature than that of

\mathrm{H}^{+}

. Reason R : A proton with same linear momentum as an electron will form a path of smaller radius of curvature on entering a uniform magnetic field perpendicularly. In the light of the above statements, choose the correct answer from the options given below

A
Both $\mathbf{A}$ and $\mathbf{R}$ are true but $\mathbf{R}$ is NOT the correct explanation of $\mathbf{A}$
B
$\mathbf{A}$ is false but $\mathbf{R}$ is true
C
$\mathbf{A}$ is true but $\mathbf{R}$ is false
D
Both $\mathbf{A}$ and $\mathbf{R}$ are true and $\mathbf{R}$ is the correct explanation of $\mathbf{A}$

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