1.
The relation E = mc² shows that:
A
Mass is constant
B
Energy is conserved
C
Mass can be converted into energy
D
Energy depends on velocity
2.
Mass number of an atom is equal to:
A
Protons only
B
Neutrons only
C
Protons + electrons
D
Protons + neutrons
3.
Which radiation has the highest ionizing power?
A
Alpha
B
Beta
C
Gamma
D
X-ray
4.
Which statement best defines falsifiability?
A
Theory must be popular
B
Theory must be simple
C
Theory must be testable
D
Theory must be complex
5.
Scattering of light explains why the sky appears
A
Red
B
Blue
C
Green
D
Yellow
6.
Which law explains energy release in nuclear reactions?
A
Ohm’s law
B
Newton’s law
C
Einstein’s mass-energy relation
D
Boyle’s law
7.
Nuclear fusion is the process of:
A
Breaking nuclei
B
Combining light nuclei
C
Electron emission
D
Radiation absorption
8.
Which factor increases the risk of electromagnetic radiation?
A
Low frequency
B
Short wavelength
C
Low energy
D
Long wavelength
9.
Falsifiability is related to:
A
Mathematics
B
Scientific theories
C
Engineering design
D
Technology
10.
Radiation used in cancer treatment is:
A
Alpha rays
B
Beta rays
C
Gamma rays
D
Infrared rays
11.
The nucleus is extremely small compared to the:
A
Electron
B
Atom
C
Proton
D
Neutron
12.
The dual nature of light means that light behaves as
A
Wave only
B
Particle only
C
Wave and particle
D
Energy only
13.
The scattering of light depends on
A
Wavelength of light
B
Speed of light
C
Intensity of light
D
Reflection of light
14.
Which is NOT a source of background radiation?
A
Cosmic rays
B
Rocks
C
Soil
D
Radio waves
15.
Which color has the highest frequency in visible light?
A
Red
B
Green
C
Blue
D
Violet
16.
Which electromagnetic waves are used for sterilizing medical equipment?
A
Infrared rays
B
Ultraviolet rays
C
Microwaves
D
Radio waves
17.
Which electromagnetic wave is used in photography?
A
Radio waves
B
Visible light
C
X-rays
D
Gamma rays
18.
In nuclear representation, what does the atomic number represent?
A
Number of neutrons
B
Number of protons
C
Total nucleons
D
Atomic mass
19.
Why clouds appear white?
A
Due to absorption
B
Due to reflection of blue light
C
Due to scattering of all wavelengths
D
Due to refraction
20.
The nucleus of an atom carries:
A
Negative charge
B
No charge
C
Positive charge
D
Variable charge