Next Term: Modern Physics (ISC 12)

Exercise and reference answers

Questions

1. Question

   In Bohr's model, angular momentum is quantized as L =

   Correct

   n h / 2pi

   Choices

   1. n h / 2pi
   2. n h
   3. h / 2pi

2. Question

   The energy of the ground state of hydrogen is

   Correct

   -13.6 eV

   Choices

   1. -13.6 eV
   2. -3.4 eV
   3. 0 eV

3. Question

   Radioactive decay follows the law N =

   Correct

   N0 e^(-lambda t)

   Choices

   1. N0 e^(-lambda t)
   2. N0 e^(lambda t)
   3. N0 t

4. Question

   The number of nucleons in a nucleus is the

   Correct

   mass number A

   Choices

   1. mass number A
   2. atomic number Z
   3. neutron number N

Instructions

Pick the correct completion for each prompt.