mcqs of physics 1st year chapter 2

Q.11 Which of the following is unit of absorbed dose?
A) Sievert                                  C) Roentgen
B) Gray                                     D) Curie

Q.13 The isotope of Iodine­131 is used in the treatment of
A) Blood cancer                                     C) Lung tumor
B) Bone cancer                                      D) Thyroid cancer

Q.14 Which of the following effect is observed due to emission of β― during the phenomenon of
radioactivity?
A) A increases by 1 and Z remains same             C) Z decreases by 1 and A remains same
B) Z increases by 1 and A remains same             D) A decreases by 1 and Z remains same

Q.15 In cloud chamber the path of β­particles is:
A) Straight, thick, short                          C) Thin, wavy, longer
B) Thin, wavy, shorter                           D) Thin, straight, short
Q.16 Among the three types of radioactive radiation, which have strongest penetration power?
A) Alpha                                    C) Beta
B) Gamma                                D) All have same penetration power