Assertion (A): A proton and an alpha particle having the same kinetic energy are moving…
Physics · Class 12 · CBSE — Moving Charges and Magnetism
Assertion (A): A proton and an alpha particle having the same kinetic energy are moving in circular paths in a uniform magnetic field. The radii of their circular paths will be equal.
Reason (R): Any two charged particles having equal kinetic energies and entering a region of the uniform magnetic field \(\vec{B}\) in a direction perpendicular to \(\vec{B}\) will describe circular trajectories of equal radii.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Answer
(D) A is false but R is true.
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