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Quiz 16
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Q.1
An electron microscope gives higher magnification than an optical microscope, because :
It uses more powerful lenses
The velocity of electron is smaller than that of visible light
The electrons have more energy than the light particles
The wavelength of electrons is smaller as compared to the wavelength of visible light
Q.2
The magnifying power of an astronomical telescope can be decreased by
Decreasing the focal length of the eyepiece
Increasing the focal length of the eyepiece
Increasing the focal length of the objective
None of these
Q.3
Fiber optics cable used in communication, works on the principle of
Regular reflection of light
Diffuse reflection of light
Refraction of light
Total internal reflection of light
Q.4
Energy is continuously created in the sun due to:
Nuclear fusion
Nuclear fission
Radioactivity
Artificial radioactivity
Q.5
In beta decay what is emitted?
Electron
Proton
Neutron
All of the above
Q.6
Optical fiber works on the principle of
Scattering
Interference
Total internal reflection
Refraction
Q.7
The wave theory of light can explain
Comptom effect
Photoelectric effect
Black body spectrum
Interference of light
Q.8
Gamma rays are emissions that have
Charge but no mass
Neither mass nor charge
Both mass and charge
Mass but no charge
Q.9
The atmospheric layer reflecting radio waves is called
Ozonosphere
Ionosphere
Stratosphere
Mesosphere
Q.10
The damage of the human body due to radiation (X-rays or gamma rays etc) is measured in :
Rems
Roentgen
Curie
Rads
Q.11
Nuclear reactors used to produce electricity are based on
Nuclear fission
Nuclear fusion
Cold fusion
Superconductivity
Q.12
The energy obtained from atoms is known as ________
Solar energy
Heat energy
Nuclear energy
Chemical energy
Q.13
A microscope used in pathological laboratories forms
Magnified, virtual, erect image
Diminished, real and erect image
Magnified, virtual and inverted image
Diminished, virtual and erect image
Q.14
The light rays used for eliminating bacteria is
X-rays
Infrared rays
Microwave radiation
Ultra-violet radiation
Q.15
Lamberts law is related to
Reflection
Refraction
Interference
Illumination
Q.16
The mass defect is the result of what action occurring?
Mass being converted to energy when protons and neutrons bind together in a nucleus
Protons and electrons being attracted to each other
Energy being converted into moles of atoms when neutrons break apart protons
Mass being converted to energy when protons and neutrons break apart in a nucleus
Q.17
The distance between node and adjacent antinode is 30 cm. The wavelength is
30 cm.
90 cm.
120 cm.
60 cm.
Q.18
What is the phenomenon which established the transverse nature of light ?
Reflection
Interference
Diffraction
Polarisation
Q.19
Which one of the following ray has minimum wavelength?
Gamma ray
Cosmic ray
Utraviolet ray
X-rays
Q.20
Nuclear Fission is caused by the impact of
Electron
Neutron
Proton
Deutron
Q.21
In a Laser (say neon laser) all the atoms emit the light waves of
Same frequency
Same amplitude
Same phase
All of the above
Q.22
Where is a transistor most likely to be found ?
Wrist watch
Fuse
Hearing aid
Fluorescent lamp
Q.23
For which one of the following, ''Diodes" are generally used for?
Rectification
Amplification
Modulation
Filtration
Q.24
In the gamma decay of a nucleus
The mass number of the nucleus changes whereas its atomic number does not change
The mass number of the nucleus does not change whereas its atomic number changes
Both the mass number and the atomic number of the nucleus change
Neither the mass number nor the atomic number of the nucleus changes
Q.25
Who among the following developed the technology of underground nuclear explosion ?
Dr. Homi J. Bhabha
Dr. Vikram Sarabhai
Dr. Raja Ramanna
Dr. P. K. Iyengar
Q.26
For a ray of light to suffer total internal reflection it has to pass from :
Glass to water
Water to glass
Air to water
Air to glass
Q.27
Radioactivity is due to
Unstable nucleus
Stable nucleus
Stable electronic configuration
Stable electronic configuration
Q.28
The wave of theory of light is based on
The laws of reflection
The laws of refraction
The inverse square law
Huyghens' principle
Q.29
The material used in the fabrication of a transistor is
Aluminium
Copper
Silicon
Silver
Q.30
For which Diode is used ?
Modulation
Oscillation
Amplification
Purification
Q.31
Golden view of sea shell is due to
Diffraction
Dispersion
Polarization
Reflection
Q.32
Radiocarbon dating technique is used to estimate the age of
Fossils
Rocks
Monuments
Soil
Q.33
Which of the following branch of Physics deal with study of Atomic Nuclei?
Nuclear Physics
Bio Physics
Atomic Physics
None of the above
Q.34
The Laser is a beam of radiations which are
Non-coherent and monochromatic
Coherent and monochromatic
Non-coherent and non-monochromatic
Coherent and non-monochromatic
Q.35
In quantum mechanics a particle is represented by a
Wave
Wave packet
Particle
None of the above
Q.36
The p wave of a normal Electrocardiogram indicates
Atrial depolarization
Ventricular repolarization
Atrial repolarization
Ventricular depolarization
Q.37
Solids which conduct electricity at higher temperature but not at lower temperature are called
Super-conductor
Metallic-conductor
Semi-conductor
Insulator
Q.38
Which one among the following components can not be developed within an ''integrated circuit"?
Diode
Triode
Transformer
Transistor
Q.39
When a piece of pure silicon is doped with aluminium, then
The conductivity of the doped silicon piece will remain the same
The doped silicon piece will become n-type
The doped silicon piece will become p-type
The resistivity of the doped silicon piece will increase
Q.40
The width of depletion layer of a P-N junction
Decreases with light doping
Increases with heavy doping
Is independent of applied voltage
Is increased under reverse bias
Q.41
The impurity atoms with which silicon should be doped to make p-type semiconductors are
Phosphorus
Antimony
Boron
Germanium
Q.42
A radioactive substance does not undergo any change (in mass or charge) during
Gamma-emission
Oxidation
Alpha-emission
Beta-emission
Q.43
When a strong beam of light is passed through a colloidal solution, the light will
Be scattered
Pass unchanged
Be absorbed
Be reflected
Q.44
Which of these waves can be polarized ?
Sound waves in air
Longitudinal waves on a string
Transverse waves on a string
Light waves
Q.45
The scientist who first sent electromagnetic waves to distant places is
James Clerk Maxwell
Heinrich Hertz
Thomas Alva Edison
John Logie Baird
Q.46
The complete form of 'IC' in electronics is
Internal circuit
Independent circuit
Integrated circuit
Inbuilt circuit
Q.47
The light of distant stars is affected by
Interstellar Dust
The Earth's Atmosphere
Both A & B
None of the above
Q.48
Which of the following phenomenon helps to conclude that light is a transverse wave?
Interference
Diffraction
Polarisation
Refraction
Q.49
A metal semiconductor junction diode is called ________
Schottky diode
Photo diode
Tunnel diode
P-N Junction diode
Q.50
When two semiconductors of p and n-type are brought in contact, they form p-n junction which acts like a/an
Conductor
Oscillator
Rectifier
Amplifier
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