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COMEDK UGET
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Physics
List of top Physics Questions asked in COMEDK UGET
'Raman frequencies' refers to
COMEDK UGET - 2008
COMEDK UGET
Physics
Units and measurement
A steel ball of mass m falls in a viscous medium with a terminal velocity V. Another steel ball of mass 64m will fall through the same liquid with terminal velocity
COMEDK UGET - 2008
COMEDK UGET
Physics
mechanical properties of fluid
If the Earth shrinks in its radius by 4%, mass remaining the same, the value of 'g' on its surface
COMEDK UGET - 2008
COMEDK UGET
Physics
Gravitation
A charge situated at a certain distance along the axis of an electric dipole experience a force
$F$
. If the distance of the charge from the dipole is doubled, the force acting on it will become
COMEDK UGET - 2008
COMEDK UGET
Physics
Electric charges and fields
Two point charges are
$3\, m$
apart and their combined charge is
$8 \mu C$
. The force of repulsion between them is
$0.012\, N$
. Charges are
COMEDK UGET - 2008
COMEDK UGET
Physics
Electric charges and fields
A body when released from the top of a tower of height
$h$
reaches the ground in time 1 second. Time in second at which it is a height
$ \frac{h}{2}$
above the groun.d is
COMEDK UGET - 2008
COMEDK UGET
Physics
Motion in a straight line
A DC source of
$30 \, V$
is connected across two resistors of
$200\, \Omega$
each connected in series. A voltmeter of resistance
$200 \, \Omega$
is connected across a resistor. It reads
COMEDK UGET - 2008
COMEDK UGET
Physics
Current electricity
A slab consists of two plates of different materials of same thickness and having thermal conductivities
$K_1$
and
$K_2$
. The equivalent thermal conductivity of the slab is
COMEDK UGET - 2008
COMEDK UGET
Physics
thermal properties of matter
A person inside water
$n_w = \frac{4}{3} $
sees the 'setting sun' at about
COMEDK UGET - 2008
COMEDK UGET
Physics
Ray optics and optical instruments
In an interference experiment two parallel vertical slits
$S_1$
and
$S_2$
are used. A thin glass plate is introduced in the path of light from
$S_1$
. Then
COMEDK UGET - 2008
COMEDK UGET
Physics
Wave optics
The range of a particle projected at an angle of 15? with the horizontal is 1.5 km. Its range when projected with the same velocity at an angle of 45? with the horizontal is
COMEDK UGET - 2008
COMEDK UGET
Physics
Motion in a plane
Angular momentum of an electron in an orbit of H atom is proportional to
COMEDK UGET - 2008
COMEDK UGET
Physics
Atoms
Formation of Eddy currents has desirable effects in 1. Electromagnetic damping, 2. Transformer 3. Inductothermy
COMEDK UGET - 2008
COMEDK UGET
Physics
Alternating current
Energy of a charged capacitor is
$E$
. It is allowed to share its charge with an identical capacitor charged to half its potential. Loss in the energy of the system is
COMEDK UGET - 2008
COMEDK UGET
Physics
electrostatic potential and capacitance
If
$2.2 \, kW$
power is transmitted through a
$10 \, W$
line at
$22 \, kV$
, power loss in the form of heat will be
COMEDK UGET - 2008
COMEDK UGET
Physics
Current electricity
In Newton ring experiment, monochromatic light is replaced by white light. Then
COMEDK UGET - 2008
COMEDK UGET
Physics
Wave optics
In a spectrometer experiment, " As wavelength of a spectral line increases, deviation also increases". This is true
COMEDK UGET - 2008
COMEDK UGET
Physics
Wave optics
In a region a stationary charge does not experience a force. It is certain that in this region
COMEDK UGET - 2008
COMEDK UGET
Physics
Moving charges and magnetism
Fine structure of spectral lines is accounted in Sommerfeld atom model by considering
COMEDK UGET - 2008
COMEDK UGET
Physics
Atoms
A spring balance carries a load. When the load is pulled aside so that the balance makes an angle of
$30^{\circ}$
with the vertical, the balance reads
$4 \, kg\, wt$
. The mass of the load is
COMEDK UGET - 2007
COMEDK UGET
Physics
laws of motion
A bulb is kept at a depth h inside water of refractive index
$' n' $
. Area of the bright patch on the water surface is
COMEDK UGET - 2007
COMEDK UGET
Physics
Ray optics and optical instruments
The normal atmospheric pressure can support water column of height L which is, (given density of mercury =
$13600\, kg\, m^{-3}$
)
COMEDK UGET - 2007
COMEDK UGET
Physics
mechanical properties of fluid
If the diameter of a capillary tube is doubled, the rate of flow ofliquid increases
COMEDK UGET - 2007
COMEDK UGET
Physics
mechanical properties of fluid
The ratio of forces between two point charges in the two cases when their separation is halved and when it is doubled, is
COMEDK UGET - 2007
COMEDK UGET
Physics
Electric charges and fields
To increase the angular width of interference fringes
COMEDK UGET - 2007
COMEDK UGET
Physics
Wave optics
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