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Chapter 18 Atomic and Nuclear Physics-14
1.
What is the range of gamma rays?
a) Several hundred metres in air
b) Infinity
c) Few centimetres in air
d) Several metres in air
2.
What is the unit in which nuclear radiation is measured?
a) Roentgen equivalent man
b) Becquerel
c) Henry
d) Disintegration per second
3.
What happens to the atomic number of an element which emits one alpha particle?
a) Stays the same
b) Decreases by 2
c) Decreases by 1
d) Increases by 1
4.
What happens to the atomic mass of an element which emits one alpha particle?
a) Decreases by 4
b) Stays the same
c) Increases by 1
d) Decreases by 1
5.
Patient should be exposed to X-rays with the limit of.....................?
a) 2.0 to 3.0 rem
b) 0.01 to 0.1 rem
c) 1.0 to 2.0 rem
d) 0.1 to 1.0 rem
6.
What is the safe limit of radiation exposure?
a) 0.5 rem per day
b) 0.5 rem per week
c) 0.5 rem per year
d) 0.5 rem per month
7.
What is the charge on alpha particle?
a) Charge = -2
b) Charge = +2
c) Charge = -1
d) No charge
8.
What is the penetration power of alpha particle?
a) Moderate penetration
b) Infinity penetration
c) Highest penetration
d) Least penetration
9.
What is the ionizing power of alpha particle?
a) Moderate ionization
b) Infinity ionization
c) Highest ionization
d) Least ionization
10.
What is the charge on beta particle?
a) Charge = +1
b) Charge = -1
c) No charge
d) Charge = -2
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