Q.1
An electron microscope gives higher magnification than an optical microscope, because :
Q.2
The magnifying power of an astronomical telescope can be decreased by
Q.3
Fiber optics cable used in communication, works on the principle of
Q.4
Energy is continuously created in the sun due to:
Q.5
In beta decay what is emitted?
Q.6
Optical fiber works on the principle of
Q.7
The wave theory of light can explain
Q.8
Gamma rays are emissions that have
Q.9
The atmospheric layer reflecting radio waves is called
Q.10
The damage of the human body due to radiation (X-rays or gamma rays etc) is measured in :
Q.11
Nuclear reactors used to produce electricity are based on
Q.12
The energy obtained from atoms is known as ________
Q.13
A microscope used in pathological laboratories forms
Q.14
The light rays used for eliminating bacteria is
Q.15
Lamberts law is related to
Q.16
The mass defect is the result of what action occurring?
Q.17
The distance between node and adjacent antinode is 30 cm. The wavelength is
Q.18
What is the phenomenon which established the transverse nature of light ?
Q.19
Which one of the following ray has minimum wavelength?
Q.20
Nuclear Fission is caused by the impact of
Q.21
In a Laser (say neon laser) all the atoms emit the light waves of
Q.22
Where is a transistor most likely to be found ?
Q.23
For which one of the following, ''Diodes" are generally used for?
Q.24
In the gamma decay of a nucleus
Q.25
Who among the following developed the technology of underground nuclear explosion ?
Q.26
For a ray of light to suffer total internal reflection it has to pass from :
Q.27
Radioactivity is due to
Q.28
The wave of theory of light is based on
Q.29
The material used in the fabrication of a transistor is
Q.30
For which Diode is used ?
Q.31
Golden view of sea shell is due to
Q.32
Radiocarbon dating technique is used to estimate the age of
Q.33
Which of the following branch of Physics deal with study of Atomic Nuclei?
Q.34
The Laser is a beam of radiations which are
Q.35
In quantum mechanics a particle is represented by a
Q.36
The p wave of a normal Electrocardiogram indicates
Q.37
Solids which conduct electricity at higher temperature but not at lower temperature are called
Q.38
Which one among the following components can not be developed within an ''integrated circuit"?
Q.39
When a piece of pure silicon is doped with aluminium, then
Q.40
The width of depletion layer of a P-N junction
Q.41
The impurity atoms with which silicon should be doped to make p-type semiconductors are
Q.42
A radioactive substance does not undergo any change (in mass or charge) during
Q.43
When a strong beam of light is passed through a colloidal solution, the light will
Q.44
Which of these waves can be polarized ?
Q.45
The scientist who first sent electromagnetic waves to distant places is
Q.46
The complete form of 'IC' in electronics is
Q.47
The light of distant stars is affected by
Q.48
Which of the following phenomenon helps to conclude that light is a transverse wave?
Q.49
A metal semiconductor junction diode is called ________
Q.50
When two semiconductors of p and n-type are brought in contact, they form p-n junction which acts like a/an
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