Beta particles ionize an atom:
A. Due to the electrostatic force of attraction
B. Due to the electrostatic force of repulsion
C. Due to a direct collision
D. Due to the gravitational force
The charge on beta particle is:
A. 1
B. -1
C. +2
D. -2
X-rays are electromagnetic waves like:
A. Light waves
B. Heat waves
C. Microwaves
D. γ-rays
The most useful tracer is:
A. Sr-90
B. I-131
C. CA-41
D. C-14
Which one of the following possesses greater penetration power:
A. α-rays
B. β-rays
C. γ-rays
D. Neutron-rays
CFC is used in:
A. Refrigeration
B. Aerosol spray
C. Plastic foam industry
D. All of above
In scientific notation, numbers are expressed in:
A. Power of ten
B. Powers of two
C. Reciprocal
D. Decimal
How many types of units are in SI:
A. 1
B. 2
C. 3
D. 4
The number of categories in which physical quantities are divided is:
A. 1
B. 2
C. 3
D. 4
Which one is not a branch of physical sciences:
A. Chemistry
B. Astronomy
C. Geology
D. Biology
