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Recent questions tagged q84
Questions
Five long wires $A,B,C,D$ and $E$ each carrying current I are arranged to form edges of a pentagonal prism as shown in figure. Each carries current out of the plane of paper . What will be the field if current in one of the wire (say A) is switched off ?
cbse
class12
physics
ch-4
sec-a
q84
ncert
medium
asked
Aug 3, 2015
by
meena.p
1
answer
What is the approximate distance upto which earth's magnetic field extends?
cbse
class12
physics
ch-5
sec-a
q84
ncert
easy
asked
Jul 21, 2015
by
meena.p
1
answer
Given the resistance of $1\Omega,2 \Omega$ and $3 \Omega$ how will be combine them to get an equivalent resistance of $\large\frac{11}{3}$$\Omega$
cbse
class12
physics
ch-3
sec-b
q84
medium
asked
Jul 6, 2015
by
meena.p
1
answer
Suppose the particle in $Q_{33}$ is an electron projected with velocity $V_x =2.0 \times 10^6 m/s$. If E between the plates separated by $0.5 \;cm$ is $9.1 \times 10^2 N/C$, where will the electron strike the upper plate ? $(|e|=1.6 \times 10^{-19}\;C,m_e=9.1 \times 10^{-3}\;kg)$
cbse
class12
physics
ch-1
q84
medium
sec-e
asked
Apr 29, 2015
by
meena.p
1
answer
The major organic compound formed by the reaction of 1, 1, 1 - trichloroethane with silver powder is
jeemain
jeemain-2014
chemistry
q84
medium
asked
Apr 7, 2014
by
sreemathi.v
1
answer
All monosacchariddes ------Tollen’s reagent
jeemain
aipmt
chemistry
biomolecules
organic-chemistry
cbse
class12
unit16
difficult
q84
asked
Mar 30, 2014
by
thanvigandhi_1
1
answer
. S1: $ \Delta H$ of a reaction is independent of temperature. \[\] S2: $\Delta H^{\circ}$ of a reaction = $ \sum H^{\circ}$(Products) - $ \sum H^{\circ}$(Reactants)
jeemain
physics
thermodynamics
cbse
class11
class12
q84
difficult
asked
Mar 20, 2014
by
thanvigandhi_1
1
answer
The gemstone Saphire is an impure form of alumina having impurity of
jeemain
cbse
chemistry
class12
unit6
general-principals-and-processes-of-isolation-of-metals
q84
easy
asked
Mar 20, 2014
by
meena.p
1
answer
Which of the following is a fully fluorinated polymer?
jeemain
aipmt
chemistry
cbse
unit5
class12
organic-chemistry-polymers
q84
difficult
asked
Mar 12, 2014
by
thanvigandhi_1
1
answer
The common metal in Brass,bronze and german silver is
jeemain
chemistry
class12
coordination-compounds
unit9
q84
easy
asked
Mar 12, 2014
by
meena.p
1
answer
Among the following isostructural compounds,identify the compound which has the highest lattice energy
jeemain
chemistry
physical-chemistry
class11
unit4
chemical-bonding-and-molecular-structure
bond-parameters
q84
medium
asked
Mar 7, 2014
by
sreemathi.v
1
answer
The density of KBr is 2.73g/cm. The length of the unit cell is 654pm. Find the number of atoms per unit cell in the cubic structure.
jeemain
chemistry
physical-chemistry
class12
unit1
states-of-matter
solid-state
calculations-involving-unit-cell-dimensions
medium
q84
asked
Feb 25, 2014
by
sharmaaparna1
1
answer
Acid-catalysed reaction of oxirane is given below:
jeemain
chemistry
unit11
unit12
class12
organic-chemistry
oxygen
ethers
q84
medium
asked
Feb 25, 2014
by
sreemathi.v
1
answer
Given the overall formation constant of the $[Fe(CN)_6]^{-4}$ ion as $10^{35}$ and the standard potential for half reaction $Fe^{+3}+e^-\leftrightharpoons Fe^{+2},E^0=0.77V$,$[Fe(CN)_6]^{-3}+e^-\leftrightharpoons [Fe(CN)_6]^{-4},E^0=0.36V$.Then the overall formation constant of $[Fe(CN)_6]^{-3}$ ion is
jeemain
chemistry
q84
medium
physical-chemistry
class12
ch3
electrochemistry
asked
Feb 18, 2014
by
sreemathi.v
1
answer
pH of a 0.1M monobasic acid is found to be 2.Hence its osmotic pressure at a given temp T is
jeemain
chemistry
class12
unit2
solutions
q84
difficult
asked
Feb 14, 2014
by
sreemathi.v
1
answer
Find the length of lactus rectum and end points of lactus rectum for a ellipse $\large\frac{x^2}{a^2}+\frac{y^2}{b^2}$$=1$?
jeemain
math
class11
coordinate-geometry-conic -sections
ellipse
ch11
q84
medium
asked
Feb 7, 2014
by
sreemathi.v
1
answer
Which of the following satisfy differential equation $(1- \sin x) ^2 y''=\cos x$
jeemain
math
class12
ch9
differential-equations
ordinary-differential-equations
q84
medium
asked
Feb 7, 2014
by
meena.p
1
answer
Transistor working as an amplifier operates in its active region of characteristic only when
jeemain
physics
class12
ch14
q84
easy
semiconductor-electronics
concepts
asked
Jan 31, 2014
by
meena.p
1
answer
The sum of absolute deviation about median is
jeemain
math
cbse
class11
statistics
easy
measures-of-dispersion-(median)
q84
asked
Jan 29, 2014
by
thanvigandhi_1
1
answer
The alkali metal used as coolant in nuclear reactors is
jeemain
chemistry
class11
s-block-elements
unit10
q84
difficult
asked
Jan 28, 2014
by
sreemathi.v
1
answer
$4LiH+AlCl_3\quad\underrightarrow{\text{dry ether}}\quad x+y$. $y$ is
jeemain
chemistry
class11
hydrogen
unit9
q84
difficult
asked
Jan 24, 2014
by
sreemathi.v
1
answer
$xNO_2+yH_2O+O_2\rightarrow 4z$.The $z$ in the equation is
jeemain
chemistry
class11
environmental-chemistry
unit14
q84
difficult
asked
Jan 22, 2014
by
sreemathi.v
1
answer
Sum of squares of first n natural numbers exceeds their sum by 330, then n =
jeemain
math
class11
ch9
sequences-and-series
easy
sum-of-n-terms-of-special-series
q84
asked
Jan 17, 2014
by
yamini.v
1
answer
A bulb emits light of $\lambda=4500A^{\circ}$ .The bulb is rated as 150watt and 8% of the energy is emitted as light.How many photons are emitted by the bulb per second?
jeemain
chemistry
physical-chemistry
class11
unit2
atomic-structure
quantum-mechanical-model
q84
medium
asked
Jan 15, 2014
by
sreemathi.v
1
answer
Equation of the line through the point $(2,-1,-1)$, which is parallel to the plane $4x+y+z+2=0$ ans is $\perp$ to the line $x=\large\frac{y}{-2}=$$z-5$ is ?
jeemain
math
class12
ch11
3d-geometry
equations-of-lines
medium
q84
asked
Jan 8, 2014
by
rvidyagovindarajan_1
1
answer
If $f$ is continuous on $[0,1]$ and $f\big(\large\frac{1}{3}\big)$$=1$ then $\lim\limits_{n\to \infty}f(\large\frac{n}{\sqrt{9n^2+1}}\big)$=
jeemain
math
ch5
continuity-and-differentiability
continuity
easy
q84
asked
Dec 30, 2013
by
sreemathi.v
1
answer
Integrate : $\int \large\frac{x^5+1}{x^2+1}$$dx$
jeemain
math
class12
ch7
integral-calculus
integration-by-subsitution
easy
q84
asked
Dec 18, 2013
by
meena.p
1
answer
Equimolar solutions of the following were prepared in water separately. Which one of the solutions will record the highest pH?
aipmt
modelpaper
chemistry
2008
q84
asked
Dec 17, 2013
by
thanvigandhi_1
0
answers
The association between Barnacles and Limulus is :
jeemain
eamcet
biology
2002
q84
asked
Dec 10, 2013
by
thanvigandhi_1
0
answers
If $\overrightarrow a\:\:and\:\:\overrightarrow b$ are two unit vectors, then $\overrightarrow a\times\overrightarrow b$ is also a unit vector if ?
jeemain
math
class12
ch10
vector-algebra
easy
vector-product
q84
asked
Dec 7, 2013
by
rvidyagovindarajan_1
1
answer
Hymenolepis nana is commonly known as
jeemain
eamcet
biology
2001
q84
asked
Dec 5, 2013
by
thanvigandhi_1
0
answers
Mortar is mixture of
jeemain
chemistry
unit15
p-block-elements
q84
sec-a
difficult
asked
Nov 29, 2013
by
sreemathi.v
1
answer
If freezing point of 0.1 M aqueous weak monobasic acid is $-0.2046^\circ C$, then $pH$ of solution is [$K_f (H_2O) = 1.86 kg mol^{-1}$]
jeemain
aipmt
equilibrium
chemistry
medium
q84
biology
asked
Nov 27, 2013
by
mosymeow_1
1
answer
The parasite of endothelial system of man is :
jeemain
eamcet
biology
2000
q84
asked
Nov 27, 2013
by
thanvigandhi_1
0
answers
Match conservation laws in List-I with the processes in List-II :
jeemain
eamcet
physics
2010
q84
asked
Nov 15, 2013
by
thanvigandhi_1
1
answer
Two identical flutes produce fundamental notes of frequency 300 Hz at $27^{\circ}C$. If the temperature of the air in one of the flutes is increased to $31^{\circ}C$, the number of beats heard per seconds will be :
jeemain
eamcet
physics
2011
q84
asked
Nov 1, 2013
by
thanvigandhi_1
1
answer
Density of a 2.05M solution of acetic acid in water is 1.02 g/mL. The molality of the solution is
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
q84
medium
asked
Oct 30, 2013
by
sreemathi.v
1
answer
The van der Waal equations for 'n' moles of a real gas is $ \bigg( p+ \large\frac{a}{V^2} \bigg) (V-b)=nRT$ where P is pressure, V is volume, T is absolute temperature, R is molar gas constant and a, b, c are Van der Waal constants.The dimensional formula for ab is
jeemain
eamcet
physics
2012
q84
asked
Oct 19, 2013
by
thanvigandhi_1
1
answer
If a body is projected with an angle $\theta$ to the horizontal, then
jeemain
eamcet
physics
2008
q84
asked
Oct 18, 2013
by
meena.p
1
answer
The value of $x$ satisfying $\sin^{-1}x+\sin^{-1}(1-x)=\cos^{-1}x$ are
jeemain
math
class12
ch2
inverse-trigonometric-functions
q84
inverse-trignometric-properties
easy
asked
Oct 11, 2013
by
sreemathi.v
1
answer
A motor of power $P_0$ is used to deliver water at a certain rate through a given horizontal pipe. To increase the rate of flow of water through the same pipe $n$ times, the power of the motor is insreased to $P_1$. The ratio of $P_1$ to $P_0$ is :
jeemain
eamcet
physics
2009
q84
asked
Oct 11, 2013
by
meena.p
1
answer
The magnifying power of the astronomical telescope for normal adjustment is 50. The focal length of the eye piece is 2cm. The required length of the telescope for normal adjustment is
jeemain
eamcet
physics
2013
q84
asked
Oct 8, 2013
by
thanvigandhi_1
1
answer
A ball is falling from a height . When it reaches 10 m height from the ground its velocity is $V_0$. It collides with the ground and loses $50 \%$ of its energy and rises back to height of 10 m. Then the velocity $V_0$ is :
jeemain
eamcet
physics
2010
q84
asked
Sep 30, 2013
by
meena.p
1
answer
In a $p-n$ junction diode the thickness of depletion layer is $2 \times 10^{-6}\;m$ and barrier potential is $0.3\;V$. the intensity of the electric field at the junction is :
jeemain
eamcet
physics
2011
q84
asked
Sep 23, 2013
by
meena.p
1
answer
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