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Recent questions tagged q117
Questions
If the absolute temperature of a sample in a fixed volume container is quadrupled then the root mean square speed in the initial state $u_i$ and that in the final stage $u_f$ would be related as:
jeemain
chemistry
physical-chemistry
class11
unit5
states-of-matter
kinetic-molecular-theory-of-gases
medium
q117
asked
Mar 2, 2014
by
sharmaaparna1
1
answer
Isomers which can not be interconverted through rotation around a single bond are : (i) Conformers ; (ii) diastereomers ; (iii) Enantiomers ; (iv) Positional isomers;
jeemain
chemistry
class11
organic-chemistry
q117
medium
basic-organic-chemistry
ch12
asked
Feb 28, 2014
by
meena.p
1
answer
Phenol undergoes condensation with acetaldehyde in acidic (or) alkali medium gives
jeemain
chemistry
unit11
unit12
class12
organic-chemistry
oxygen
phenols
q117
easy
asked
Feb 27, 2014
by
sreemathi.v
1
answer
Find the equation of normal for the hyperbola $\large\frac{x^2}{a^2}-\frac{y^2}{b^2}$$=1$ in parametric form?
jeemain
math
class11
coordinate-geometry-conic -sections
hyperbola
ch11
q117
medium
asked
Feb 10, 2014
by
sreemathi.v
1
answer
Let $a_{n}\;$ be $\;n^{th}$ term of AP. If $\;\displaystyle\sum_{r=1}^{50}\;a_{2r}=p\;and \;\displaystyle\sum_{r=1}^{50}\;a_{2r-1}=q\;$ the common difference is :
jeemain
math
class11
ch9
sequences-and-series
easy
sum-of-n-terms-of-special-series
q117
asked
Jan 21, 2014
by
yamini.v
1
answer
Calculate momentum of radiations of wavelength 0.33nm
sat
chemistry
atomic-structure
jeemain
physical-chemistry
class11
unit2
quantum-mechanical-model
q117
medium
asked
Jan 16, 2014
by
sreemathi.v
1
answer
In a rt. angled triangle $ABC$ if hypotenuse, $AB=p$, then $\overrightarrow {AB}.\overrightarrow {AC}+\overrightarrow {BC}.\overrightarrow {BA}+\overrightarrow {CA}.\overrightarrow {CB}$= ?
jeemain
math
class12
ch10
vector-algebra
easy
addition-of-vectors
q117
asked
Jan 7, 2014
by
rvidyagovindarajan_1
1
answer
Use the formula $\lim\limits_{x\to 0}\large\frac{a^x-1}{x}=$$ln\; a$ to find $\lim\limits_{x\to 0}\large\frac{2^x-1}{(1+x)^{1/2}-1}$
jeemain
maths
ch13
limits and derivatives
introduction to limits
medium
q117
asked
Dec 31, 2013
by
sreemathi.v
1
answer
Find the value of $ \int \limits _0^{\infty} \large\frac{\tan^{-1} (ax)}{x(1+x^2)}$$dx$
jeemain
math
class12
unit9
integral-calculus
difficult
q117
asked
Dec 20, 2013
by
meena.p
0
answers
In germination seeds fatty acids are degraded exclusively in the :
aipmt
modelpaper
biology
2008
q117
asked
Dec 18, 2013
by
thanvigandhi_1
0
answers
The threshold frequency of the metal of the cathode in a photoelectric cell is $ 1 \times 10^{15}\: Hz$ . When a certain beam of light is incident on the cathode, it is found that a stopping potential '4.144 V' is required to reduce the current to zero. The frequency of the incident radiation is : $ ( h = 6.63 \times 10^{-34} J-s)$
jeemain
eamcet
physics
2010
q117
asked
Nov 18, 2013
by
thanvigandhi_1
3
answers
When two electrons enter into a magnetic field with different velocities, they deflect in different circular paths, in such a way that the radius of one path is double that of the other $ 1 \times 10^7\: ms^{-1}$ is the velocity of the electron in smaller circle of radius $ 2 \times 10^{-3} m$ . The velocity of electron in the other circular path is :
jeemain
eamcet
physics
2011
q117
asked
Nov 4, 2013
by
thanvigandhi_1
1
answer
X-rays of energy 50 KeV and scattered from a carbon target. The scattered rays are deleted at $90^{\circ}$ from the innocent beam. The percentage changes in wavelength approximately $[m_e= 9.0 \times 10^{-31}kg, c= 3 \times 19^8 m/sec]$ is
jeemain
eamcet
physics
2008
q117
asked
Oct 20, 2013
by
meena.p
1
answer
The deflection of the magnetic needle in an tangent galvanometer is $30^{\circ}$ when a current of one ampere flows through it. The deflection of the magnetometer when a current of 4 amp flows through it is
jeemain
eamcet
physics
2012
q117
asked
Oct 20, 2013
by
thanvigandhi_1
1
answer
A bullet of mass $0.02\;kg$ travelling horizontally with velocity $250\;ms^{-1}$ strikes a block of wood of mass $0.23\;kg $ which rests on a rough horizontal surface. After the impact, the block and bullet move together and come to rest after travelling a distance of $40\;m$ . The coefficient of sliding friction of the rough surface is : $(g=9/8 ms^{-2})$
jeemain
eamcet
physics
2009
q117
asked
Oct 14, 2013
by
meena.p
1
answer
An electron beam in a TV picture is accelerated through a potential difference of V volts. It passes through a region of transverse magnetic induction field (B) and follows a circular orbit of radius 'r'. The induced magnetic field (B) is
jeemain
eamcet
physics
2013
q117
asked
Oct 12, 2013
by
thanvigandhi_1
1
answer
In Thomson's experiment to determine $\large\frac{e}{m}$ of an electron , it is found that an electron beam having a kinetic energy of $45.5\;eV$ remains undeflected, when subjected to crossed electric and magnetic fields. If $E=1 \times 10^{3} Vm^{-1}$, the value of $'B'$ is (mass of the electron is $9.1 \times 10^{-31}\;kg$) :
jeemain
eamcet
physics
2010
q117
asked
Sep 30, 2013
by
meena.p
0
answers
The thermo e.m of a hypothetical thermocouple varies with the temperature $\theta$ of hot junction as $E= a \theta + b \theta^2$ in volts, where the ratio $a/b$ is $700^{\circ}C$. If the cold junction is kept at $0^{\circ}C,$ then the neutral temperature is :
jeemain
eamcet
physics
2011
q117
asked
Sep 24, 2013
by
meena.p
1
answer
The radius of $_{72}Te^{125}$ nucleus is $6$ fermi . The radius of $_{13}AI^{27}$ nucleus in meters is
jeemain
eamcet
physics
2013
q117
asked
Sep 18, 2013
by
meena.p
1
answer
The order of $[7]$ in $(Z_{9},+_{9})$ is
tnstate
class12
bookproblem
p240
objective
q117
modelpaper
oct-2006
oct-2007
jun-2008
mar-2009
asked
May 24, 2013
by
poojasapani_1
1
answer
The co-ordinate of the vertices of the rectangular hyperbola $xy=16$ are
tnstate
class12
bookproblem
p276
objective
q117
modelpaper
mar-2007
asked
May 14, 2013
by
poojasapani_1
1
answer
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