,1. What is the primary mechanism by which thermal energy is conducted in
metals?
a. Phonon scattering
b. Electron mobility
c. Vacancy diffusion
d. Freezing transitions
Answer: b. Electron mobility
Rationale: Metals have free electrons that facilitate rapid thermal
conductivity.
2. In a solar cell, which material property is most critical for efficient energy
conversion?
a. Thermal conductivity
b. Electrical resistivity
c. Band gap
d. Density
Answer: c. Band gap
Rationale: The band gap determines the energy range in which the cell
can absorb and convert solar energy into electricity.
3. Which law best explains the relationship between pressure and volume
in a closed system of gas at constant temperature?
a. Charles's Law
b. Avogadro's Law
, c. Boyle's Law
d. Pascal's Law
Answer: c. Boyle's Law
Rationale: Boyle's Law states that for a fixed amount of gas at constant
temperature, pressure and volume are inversely proportional.
4. In a double-slit interference experiment, what causes the dark fringes
observed on the screen?
a. Constructive interference
b. Destructive interference
c. Diffraction of light
d. Reflection of light
Answer: b. Destructive interference
Rationale: Dark fringes occur due to the destructive interference of
light waves, where path differences result in phase cancellations.
5. What is the primary function of leukocytes in the human body?
a. Oxygen transport
b. Blood clotting
c. Nutrient transport
d. Immune response
Answer: d. Immune response
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