MCQ Bank
A Kelvin thermometer and a Fahrenheit thermometer both give the same reading for a certain sample. The corresponding Celsius temperature is:
- A) 301?C
- B) 574?C
- C) 614?C
- D) 232?C
Which type of defect is caused by the different wavelengths of light being focused at different distances?
- A) Chromatic aberration
- B) Hypermetropia
- C) Myopia
- D) Spherical aberration
Interference of light is evidence that:
- A) light is a transverse wave
- B) light is electromagnetic in character
- C) light is a wave phenomenon
- D) the speed of light is very large
Length contraction refers to:
- A) Expansion of space
- B) Shortening of space
- C) Space evaluation
- D) Stationary space
The efficiency of a heat engine is always:
- A) Less than 1
- B) zero
- C) More than 1
- D) 1
Time dilation is more prominent at:
- A) High speed
- B) Rest
- C) Constant speed
- D) Low speed
The photoelectric effect is described as:
- A) Metals emit light when electrons move from one energy level to another.
- B) Electrons are ejected from a metal surface under the influence of light.
- C) Electrons move freely in a metal under the influence of an electric field.
- D) Electrons are emitted from a metal surface when it is heated.
Entropy measures the:
- A) Disorder of the system
- B) Orderliness of the system
- C) Energy of the system
- D) Order of the system
The most refined form of matter is:
- A) Smog
- B) Fog
- C) Smoke
- D) Light
Time dilation and length contraction are essential concepts in understanding:
- A) Classical mechanics
- B) Einstein's theory of relativity
- C) Bio-physics
- D) Electromagnetism
When an electromagnetic wave strikes the boundary of a rare medium, it undergoes:
- A) A phase change of 180° upon refraction.
- B) A phase change of 0° upon reflection.
- C) A phase change of 0° upon refraction.
- D) A phase change of 180° upon reflection.
Light passes from a material with index of refraction 1.3 into one with index of refraction 1.2. Compare to incident ray, the refracted ray will ___________.
- A) Not bend
- B) Have more intensity
- C) Bend towards the normal
- D) Bend away from the normal
What is the unit of magnification factor?
- A) degree.Kelvin
- B) no units
- C) radian.Kelvin
- D) meter.Kelvin
The speed of light in free space is:
- A) Unpredictable
- B) Constant
- C) Less than that in air
- D) Variable
Heat is:
- A) A temperature di?erence
- B) Energy transferred by virtue of a temperature di?erence
- C) Energy transferred by macroscopic work
- D) Energy content of an object
In which year did Ole Rømer conduct the experiment to estimate the speed of light using the timing of the eclipse of Jupiter's moon?
- A) 1675
- B) 1764
- C) 1558
- D) 1842
Which celestial body is involved in Ole Rømer's experiment to measure the speed of light?
- A) Saturn
- B) Mars
- C) Jupiter
- D) Venus
Why does the entropy of a gas increase when it is heated?
- A) Atoms move slower.
- B) Atoms become heavier.
- C) Atoms move faster.
- D) Atoms collide less frequently.
How do rays reflect off a concave lens compared to a convex lens?
- A) Converge
- B) Diverge
- C) Scatter
- D) No change
The equation of state for an ideal gas is:
- A) ΔE = Δq + Δw
- B) E = q + w
- C) PV = NkBT
- D) PV = NkBR