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Work, Energy, Power and Collision — JEE physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceJEE physicsWork, Energy, Power and Collision1 Mark
MCQ
Four particles given, have same momentum which has maximum kinetic energy
  • A
    Proton
  • ✓
    Electron
  • C
    Deutron
  • D
    $\alpha$-particles
✓

Answer

Correct option: B.
Electron
$E=\frac{P^2}{2 m} \therefore E \propto \frac{1}{m}$ (If $P=$constant) i.e.thelightest particle will possess maximum kinetic energy and in the given option mass of electron is minimum.

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