مرکزی طبیعیات

بارہویں جماعت · طبیعیات · 6 سوالات

نام: ____________________   تاریخ: ____________

1. Binding energy of a nucleus is the energy needed to:

   • A Heat it
   • B Rotate it
   • C Add an electron
   • D Separate it into nucleons

2. The mass defect is the difference between the:

   • A Mass of two atoms
   • B Mass of separate nucleons and the nucleus
   • C Charge and mass
   • D Atomic and mass number

3. A radioactive sample has a half life of 5 hours. After 15 hours the fraction left is:

   • A 1/2
   • B 1/4
   • C 1/8
   • D 1/3

4. Beta decay increases the atomic number by:

   • A 0
   • B 1
   • C 4
   • D 2

5. A fission chain reaction is controlled in a reactor using:

   • A Water only
   • B More uranium
   • C Air
   • D Control rods

6. The energy released from 1 atomic mass unit converted completely is about:

   • A 9310 MeV
   • B 931 MeV
   • C 9.31 MeV
   • D 93 MeV