General Awareness Quiz – Physics
General Awareness Quiz Set 55 for SSC CGL, SSC CHSL and Railways exams. Physics Quiz for SSC CGL, SSC CHSL, Railways etc.
Topic: General Science- Physics
- Gas thermometers are much more sensitive than liquid thermometers as the gases:
A) are lighter
B) have low specific heat
C) have large coefficient of expansion
D) have high specific heat
View answer
Option C.
Explanation: Gases are more sensitive to the temperature than liquids (such as mercury). Which means gas expands more than the mercury for the same increase of temperature. Hence the gas thermometer is sensitive than liquid (mercury) thermometer.
- The cream gets separated from the milk when milk is churned vigorously, due to which force?
A) Centripetal Force
B) Frictional Force
C) Centrifugal Force
D) Gravitational Force
View answer
Option C.
Explanation: The separation of cream from milk is based on the fact that when liquids of different specific gravity revolve around the same centre at the same distance with the same velocity, a greater centrifugal force is exerted on the heavier liquid than on the lighter one. Milk consists of two liquids of different specific gravity: fat and milk serum.
- Matter waves are
A) de Broglie waves
B) Electromagnetic waves
C) Transverse waves
D) Longitudinal waves
View answer
Option A.
Explanation:In mechanics, matter waves or de Broglie waves reflects the wave-particle duality of matter. The de Broglie relations show that the wavelength is inversely proportional to the momentum of a particle and is also called de Broglie wavelength.
- Which of the following is not caused by atmospheric refraction of light?
A) Twinkling of starts at night
B) Sun appearing red at sunset
C) Sun appearing higher in the sky than it actually is
D) Sun becoming visible two or three minutes before actual sunrise
View answer
Option C.
Explanation: The twinkling of stars and variation in size of the sun are due to atmospheric refraction of light. Besides, refraction is also responsible for the sun to look during sunset and sunrise. It is also responsible for the sun becoming two or three minutes before actual sunrise. The sun appears higher or lower in the sky due to the changing position of the Earth relative to the Sun.
- What is Neuron?
A) Particle released during Radioactivity
B) Basic Unit of Energy.
C) The Anti-Particle of Neuron
D) Basic Unit of Nervous System
View answer
Option D.
Explanation: A neuron is a nerve cell that is the basic block of the nervous system. Neurons are specialized to transmit information throughout thet body. These highly specialized nerve cells are responsible for communicating information in both chemical and electrical forms.
- Instrument used to study the behavior of vibrating string is:
A) Barometer
B) Hydrometer
C) Sonometer
D) Hygrometer
View answer
Option C.
Explanation: A Sonometer is a device for demonstrating relationship between the frequency of the produced by a plucked string, and the tension, and mass per unit length of the string. These relationships are usually called Mersenne’s law after Marin Mersenne (1588-1648), who investigated and codified them.
- Indicate the correctly rearranged arrangement in order to their increasing wavelength of Electromagnetic Radiation:
A) Microwave<Infrared<Visible<X-Rays.
B) X-Rays<Infrared<Visible<Microwave.
C) X-Rays<Infrared<Microwave<X-Rays.
D) X-Rays<Visible<Infrared<Microwave.
View answer
Option B.
Explanation: The Electromagnetic spectrum in order of Energy, thus increasing wavelength : Gamma Rays-wavelength: 0.01 nm ; X-ray – 1 nm ; Ultra-violet Rays-0.1 micrometers : Red light : 0.7 micrometers, Violet light – 0.4 micrometers ; Infrared Radiation-0.01 mm : Microwaves – less than 10 cm, usually 1cm : Radio wave- Long Medium and Short Waves : 2 km-10 m : and Very High Frequency (VHF) and Ultra High Frequency (UHF):10 m-10 cm.
- Which of the following supports particle nature of photons?
A) Diffraction
B) Photoelectric Effect
C) Polarization
D) Interference
View answer
Option B.
Explanation: Light is made up of photons, so it has some particle properties. In the photoelectric effect, light has material which absorbs it, and then ejects ing electrons. The reason that the photoelectric evidence for the particle nature of light has to how materials absorb that light energy and it in the form of electrons.
- Alpha particle is the Nucleus of an atom of?
A) Lithium
B) Helium
C) Hydrogen
D) Oxygen
View answer
Option B.
Explanation: Alpha particles consist of two protons and two neutrons bound together into a particle identical to helium nucleus, which is generally produced in process of alpha decay.
- The device used for measuring the wavelength of X-Rays is
A) G.M Counter
B) Cyclotron
C) Bragg Spectrometer
D) Mass Spectrometer
View answer
Option C.
Explanation: Bragg Spectrometer is an instrument used to analyze crystal structure by using X-rays. In it, a beam of collimated X-rays strikes the crystal, and a detector measures the angles and intensities of the reflected beam.
