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COMEDK UGET
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Physics
List of top Physics Questions asked in COMEDK UGET
Axes of polariser and analyser are inclined at an angle
$60^{\circ}$
. Intensity of emerging light from analyser is
$I$
. Intensity of light on the polariser is
COMEDK UGET - 2010
COMEDK UGET
Physics
Wave optics
Decrease in wavelength as a result of scattering is observed in
COMEDK UGET - 2010
COMEDK UGET
Physics
Wave optics
In Young's double slit experiment, intensities at a bright fringe is
$I$
. When one of the slits is dosed, intensity at the same position is
COMEDK UGET - 2010
COMEDK UGET
Physics
Wave optics
A black body emits maximum energy at wavelength
$\lambda_0$
when temperature is
$T_1$
. At temperature
$T_2$
, it emits maximum energy at
$\frac{4}{5} \lambda_0$
? Ratio of the two temperature
$T_1: T_2$
is
COMEDK UGET - 2010
COMEDK UGET
Physics
thermal properties of matter
Weight of a body
COMEDK UGET - 2010
COMEDK UGET
Physics
Gravitation
A plano-convex lens
$(f = 20 cm)$
is silvered at plane surface. Now focal length will be
COMEDK UGET - 2010
COMEDK UGET
Physics
Ray optics and optical instruments
Dielectric constant of a metal is
COMEDK UGET - 2009
COMEDK UGET
Physics
electrostatic potential and capacitance
Two rods of same area of cross section and lengths, and conductivities
$K_1$
and
$K_2$
are connected in series. Then, in steady state conductivity of the combination is
COMEDK UGET - 2009
COMEDK UGET
Physics
thermal properties of matter
If the Earth shrinks in its size (radius) mass remaining the same, the value of g on its surface will
COMEDK UGET - 2009
COMEDK UGET
Physics
Gravitation
A stone dropped from the top of a tower reaches ground in 4 s. Height of the tower is
$(g = 10 \, m/s^2)$
COMEDK UGET - 2009
COMEDK UGET
Physics
Motion in a straight line
$_6C^{14}$
and
$7_N^{15}$
are examples of
COMEDK UGET - 2009
COMEDK UGET
Physics
Nuclei
If only 2% of the main current is to be passed through a galvanometer of resistance G, the resistance of shunt should be
COMEDK UGET - 2009
COMEDK UGET
Physics
Moving charges and magnetism
$n $ type and $p$ type semiconductors can be obtained by doping pure silicon respectively with
COMEDK UGET - 2009
COMEDK UGET
Physics
Semiconductor electronics: materials, devices and simple circuits
The square of the resultant of two equal forces acting at a point is equal to three times their product. Angle between them is
COMEDK UGET - 2009
COMEDK UGET
Physics
laws of motion
A calcite crystal is placed over a dot on a paper sheet and the crystal is rotated. On viewing through the calcite one sees
COMEDK UGET - 2009
COMEDK UGET
Physics
Wave optics
With the addition of impurities surface tension of a liquid
COMEDK UGET - 2009
COMEDK UGET
Physics
mechanical properties of fluid
Potential energy of two charges
$10 \, nC$
each separated by a distance of 0.09 m in air is
COMEDK UGET - 2009
COMEDK UGET
Physics
Electrostatic potential
Viscosity decreases with increase in temperature is the reason for (i) hot water moving faster than cold water (ii) more viscous oils are used in motor cars during summer than in winter
COMEDK UGET - 2009
COMEDK UGET
Physics
mechanical properties of fluid
Specific resistance of a conductor material increases with
COMEDK UGET - 2009
COMEDK UGET
Physics
Resistance
Quality factor of a series
$LCR$
circuit decreases from 3 to 2. Resonant frequency is
$600 \, Hz$
. Change in band width is
COMEDK UGET - 2009
COMEDK UGET
Physics
LCR Circuit
Proton and
$\alpha$
particle have the same deBroglie wavelength. Which one is the same for both of them ?
COMEDK UGET - 2009
COMEDK UGET
Physics
de broglie hypothesis
A star is moving away from the Earth with speed
$V$
. Change in wavelength
$(d\lambda)$
observed on Earth is
COMEDK UGET - 2009
COMEDK UGET
Physics
Wave optics
Power factor of a series
$LCR $
circuit is
COMEDK UGET - 2009
COMEDK UGET
Physics
LCR Circuit
Distance between two point charges is increased by 20%. Force of interaction between the charges
COMEDK UGET - 2009
COMEDK UGET
Physics
Electric charges and fields
A
$CE$
amplifier has current gain 50. Load resistance is
$4 \, k\Omega$
and input resistance is
$500 \, \Omega . 10 \, m V \, AC$
signal is applied. Peak value of output signal is
COMEDK UGET - 2009
COMEDK UGET
Physics
Semiconductor electronics: materials, devices and simple circuits
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