JEE Main2012PhysicsNuclear PhysicsActual
Assume that a neutron breaks into a proton and an electron. The energy released during this process is (Mass of neutron =1.6725 10⁻²⁷ ~kg ; mass of proton =1.6725 10⁻²⁷ ~kg ; mass of electron =9 10⁻³¹ kg )
Options
- A0.73 ~MeV
- B7.10 ~MeV
- C6.30 ~MeV
- D5.4 ~MeV
Correct answer
A. 0.73 ~MeV
Step-by-step solution
aligned m & = (m_p+m_e )-m_n & =9 10⁻³¹ ~kg . aligned Energy released = (9 10⁻³¹ ~kg ) c ^2 joules aligned & = 9 10⁻³¹ (3 10^8 )^2 1.6 10⁻¹³ MeV & =0.73 ~MeV . aligned