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Recent questions tagged q115
Questions
At room temperature , the rms speed of molecules of a certain diatomic gas is formed to be 1930 m/Sec . The gas is
jeemain
chemistry
states-of-matter
unit5
class11
medium
q115
asked
Mar 2, 2014
by
sharmaaparna1
1
answer
Which of the following compounds will have only primary and tertiary carbon? (i) Pentane (ii) 2- Methylbutane (iii) 2,3 -Dimethylbutane (iv) 2- Bromo-2-Methylpropane
jeemain
chemistry
class11
organic-chemistry
q115
difficult
basic-organic-chemistry
ch12
asked
Feb 28, 2014
by
meena.p
1
answer
In the following compounds
jeemain
chemistry
unit11
unit12
class12
organic-chemistry
oxygen
phenols
q115
easy
asked
Feb 27, 2014
by
sreemathi.v
1
answer
Find the equation of tangent for the hyperbola $\large\frac{x^2}{a^2}-\frac{y^2}{b^2}$$=1$ in parametric form?
jeemain
math
class11
coordinate-geometry-conic -sections
hyperbola
ch11
q115
medium
asked
Feb 10, 2014
by
sreemathi.v
1
answer
Sum of series $\;S=\frac{1}{2\sqrt{1}+1\sqrt{2}}+\frac{1}{3\sqrt{2}+2\sqrt{3}}+\;....\;+\frac{1}{100\sqrt{99}+99\sqrt{100}} \;is$
jeemain
math
class11
ch9
sequences-and-series
easy
sum-of-n-terms-of-special-series
q115
asked
Jan 20, 2014
by
yamini.v
1
answer
Find the quantum no 'n' corresponding to the excited state of $He^+$ ion if on transition to the ground state that ion emits two photons in succession with wavelength 108.5 and 30.4nm
jeemain
chemistry
physical-chemistry
class11
unit2
atomic-structure
quantum-mechanical-model
q115
difficult
asked
Jan 16, 2014
by
sreemathi.v
1
answer
If $P$ is point whose position vector is $\overrightarrow r=x\hat i+y\hat j+z\hat k$ where $x,y,z \in N$ and $\overrightarrow a=\hat i+\hat j+\hat k$, then the number of possible points $P$ for which $\overrightarrow r.\overrightarrow a=10$ is ?
jeemain
math
class12
ch10
vector-algebra
medium
multiplication-by-a-scalar
q115
asked
Jan 7, 2014
by
rvidyagovindarajan_1
1
answer
Let $f:R\rightarrow R$ be a function such that $f(x+y)=f(x)+f(y)\forall x,y\in R$ if $f(x)$ is differentiable at $x=0$ then
jeemain
math
ch5
continuity-and-differentiability
differentiability
medium
q115
asked
Dec 31, 2013
by
sreemathi.v
1
answer
Integrate : $\int (x+1)^2$
jeemain
math
class12
unit9
integral-calculus
easy
q115
asked
Dec 20, 2013
by
meena.p
0
answers
In the light of recent classification of living organisms into three domains of life ( bacteria, archaea and eukarya ) , which one of the following statements is true about archaea ?
aipmt
modelpaper
biology
2008
q115
asked
Dec 18, 2013
by
thanvigandhi_1
0
answers
A metal rod of length 2 m is rotating with an angular velocity of 100 radiance / second in a plane perpendicular to a uniform magnetic field of 0.3 T. The potential difference between the ends of rod is :
jeemain
eamcet
physics
2010
q115
asked
Nov 18, 2013
by
thanvigandhi_1
1
answer
A series LCR circuit is connected to a source of alternating emf 50 V and if the potential differences across inductor and capacitor are 90 V and 60 V respectively, the potential difference across resistor is :
jeemain
eamcet
physics
2011
q115
asked
Nov 4, 2013
by
thanvigandhi_1
1
answer
Two concentric coils of 10 turns each are placed in the same plane. Their radii are 20 cm and 40 cm and carry 0.2 and 0.3 amp. current respectively in opposite directions. The magnetic induction (in Tesla) at the center is
jeemain
eamcet
physics
2008
q115
asked
Oct 20, 2013
by
meena.p
1
answer
The de-Broglie wavelength of a free electron with kinetic energy 'E' is $ \lambda$. If the kinetic energy of the electron is doubled, the de-Broglie wavelength is
jeemain
eamcet
physics
2012
q115
asked
Oct 20, 2013
by
thanvigandhi_1
1
answer
The radio activity of a sample is $'X'$ at a time $'t_1'$ and $'Y'$ at a time '$t_2'$. If the mean life time of the specimen is 't', the number of atoms that have disintegrated in the time interval $(t_1-t_2)$ is :
jeemain
eamcet
physics
2009
q115
asked
Oct 14, 2013
by
meena.p
1
answer
The $ K_{ \alpha} - $ X-ray of molybdenum has a wave length of $ 71 \times 10^{-12}m$. If the energy of a molybdenum atom with K-electron removed is 23.32 KeV, then the energy of molybdenum atom when an L-electron removed is $(hc = 12.42 \times 10^{-7} eV)$
jeemain
eamcet
physics
2013
q115
asked
Oct 12, 2013
by
thanvigandhi_1
1
answer
A capacitor $0.1\;\mu F$ connected in series to a resistor of $10 \;M \; \Omega$ is charged to a certain potential and then made a discharge through the resistor. The time in which the potential will take to fall to half its original value is (Given $\log _{10}2=0.3010$):
jeemain
eamcet
physics
2010
q115
asked
Sep 30, 2013
by
meena.p
1
answer
The electric current i in the circuit shown is :
jeemain
eamcet
physics
2011
q115
asked
Sep 24, 2013
by
meena.p
1
answer
Initially a photon of wavelength $\lambda _1$ falls on photocathode and emits an electron of maximum energy $E_1$. If the wave length of the incident photon i changed to $\lambda _2$, the maximum energy of the electron emitted becomes $E_2$. Then value of hc (h= Planck's constant , c= velocity of light) is
jeemain
eamcet
physics
2013
q115
asked
Sep 18, 2013
by
meena.p
1
answer
Length of the semi-transverse axis of the rectangular hyperbola $xy=8$ is
tnstate
class12
bookproblem
p276
objective
q115
asked
May 14, 2013
by
poojasapani_1
1
answer
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