Physics MCQ Set 8

Question : According to Rutherford the size of the nucleus is of order of

1. 10^-45 m
2. 10^-14 m
3. 10^-43 m
4. 10^-42 m

Question : In discovery of nucleus Rutherford bombarded a thin gold foil with fast moving

1. Beta particles
2. Gamma particles
3. Alpha particle
4. X-rays

Question : If 15/16 of the radioactive atoms of an element decays in 8 min what will be its half-life?

1. 1 min
2. 2 min
3. 3 min
4. 4 min

Question : After alpha decay the atomic number of the atom

1. Increase by four
2. Decreases by two
3. Increases by two
4. Decreases by four

Question : The half-life of radium is 1600 years. What is the fraction of radium sample that would survive after 6400 years?

1. 1/4
2. 1/2
3. 1/8
4. 1/16

Question : The tumors are irradiated by

1. Protons
2. Gamma rays
3. Beta particles
4. Alpha particles