Subject: Physics (Part-ii) Time: 40 Min chapter # 21 mcq’s for entry test

1. 
   The atomic number is three times less than the mass number, the number of neutrons in the nucleous will be:
   

C. 3A/4 D. 4A/3

2. 
   If F_pn , F_pp and F_nn denote net force between proton and neutron, proton and proton, neutron and neutron respectively then:
   

C. F_pp > F_pn = F_nn D. F_pp< F_pn = F_nn

3. 
   The nuclei which have different atomic numbers but equal number of neutrons are called:
   

C. Isotones D. Isomers

A. Force on a current carrying conductor in a uniform magnetic field

B. Force on a charged particle in a uniform magnetic field

C. Force on a proton in a uniform magnetic field

D. Force on an electron in a uniform magnetic field
5. In mass spectrograph the radius of an isotope of mass ‘m’ is ‘r’. If all other factors are constant, the

radius of an isotope having mass 2m will be:

A. 2r B. 4r

C. 2r² D. √2 r