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Physics
List of top Physics Questions
Joule second is the unit of
Physics
Units and measurement
It is difficult to fill a capillary tube with mercury than with water since
Physics
mechanical properties of fluid
Isoclinic lines are the lines joining places of :
Physics
the earth's magnetic field
Interference fringes were produced in Youngs double slit experiment using light of wavelength
$5000 ?$
. When a film of material
$2.5 \times 10^{-3}\, cm$
thick was placed over one of the slits, the fringe pattern shifted by a distance equal to
$20$
fringe widths. The refractive index of the material of the film is
Physics
Wave optics
Intensity of light depends on
Physics
Wave optics
Initial velocity of a particle is
$u$
at time
$t = 0$
. If acceleration
$f $
of the particle is given by at, then the valid relation is
Physics
Motion in a straight line
Infrared spectrum lies between:
Physics
Ray optics and optical instruments
Induction furnace makes use of :
Physics
Electromagnetic induction
In Young's double'sIit experiment, Let
$\beta$
be the fringe width and
$I_0$
be the intensity at the central bright fringe. At a distance 'x' from the central bright fringe, the intensity will be.
Physics
Wave optics
In Young?? double slit experiment the slits are separated by
$0.28 \,mm$
and the screen is placed
$1.4\, m$
away. The distance between the central and fourth bright fringe is measured to be
$1.2 \,cm$
. The wavelength of light used in the experiment is
Physics
Wave optics
In Young's double slit experiment the two slits are d distance apart. Interference pattern is observed on a screen at a distance D from the slits. A dark fringe is observed on the screen directly opposite to one of the slits. The wavelength of light is
Physics
Wave optics
In which region of electromagnetic spectrum does the Lyman series of hydrogen atom lie
Physics
Atoms
In which of the following the interference is NOT produced by the division of wave front?
Physics
Wave optics
In which of the following regions of the atmosphere, ozone layer exists?
Physics
Electromagnetic waves
In which medium the velocity of light is more?
Physics
Ray optics and optical instruments
In which case the potential energy decrease on
Physics
work, energy and power
In van der Waal?? equation the critical pressure
$P_c$
is given by
Physics
kinetic theory
In vacuum, speed of light depends upon
Physics
Wave optics
In TV broadcasting both picture and sound are transmitted simultaneously. In this
Physics
communication systems
In the Searle's method to determine the Young's modulus of a wire, a steel wire of length 156 cm and diameter 0.054 cm is taken as experimental wire. The average increase in length for
$1\frac{1}{2}$
kg wt is found to be 0.05.cm. Then the Young's modulus of the wire
Physics
mechanical properties of solids
In the pressure cooker the cooking is faster because the increase of vapour pressure
Physics
thermal properties of matter
In the propagation of electromagnetic waves, the angle between the direction of propagation and plane of polarisation is
Physics
Wave optics
In the nuclear reactors the moderators are used to :
Physics
Atoms
In the following reaction, the energy released is
$4 ^{1}_{1}H \to ^{4}_{2}He + 2e^{+} +$
Energy Given : Mass of
$^{1}_{1}H = 1.007825 \,u$
Mass of
$^{4}_{2}He = 4.002603\, u$
Mass of
$e^{+} = 0.000548\, u$
Physics
Nuclei
In the formula
$X = 3YZ^2$
,
$X$
and
$Z$
have dimensions of capacitance and magnetic induction respectively. The dimensions of
$Y$
in
$MKSQ$
system are
Physics
Units and measurement
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