AP EAMCET20225 Jul 2022Evening ShiftPhysicsDual Nature of MatterActual
A particle of mass 2 10⁻²⁷ ~kg has de-Broglie wavelength of 3.3 10⁻¹⁰ ~m . The kinetic energy of this particle is (Plank's Constant . h =6.6 10⁻³⁴ ~J - s )
Options
- A5 10⁻²⁰ ~J
- B8 10⁻²⁰ ~J
- C1 10⁻²¹ ~J
- D6 10⁻²² ~J
Correct answer
C. 1 10⁻²¹ ~J
Step-by-step solution
As = h P = h 2 ~m ( ~K . E ) K E = h ^2 2 ~m ^2 So, K.E = (6.6 10⁻³⁴ )^2 2 2 10⁻²⁷ (3.3 10⁻¹⁰ )^2 =1 10⁻²¹ ~J