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Recent questions tagged 34
Questions
The mixture that forms maximum boiling azeotrope is :
neet
chemistry
past papers
2019
34
asked
Jul 8, 2019
by
pady_1
1
answer
Diamagnetic substance are :
jeemain
physics
past papers
1998
34
asked
Dec 19, 2018
by
pady_1
0
answers
In a Huygen's eye piece, with an eye piece of focal length F, the distance between the eye piece and field lens should be :
jeemain
physics
past papers
1999
34
asked
Dec 19, 2018
by
pady_1
0
answers
$R$ and $r$ are the radii of the earth and moon respectively, $\rho_e$ and $\rho_m$ are densities of earth and moon respectively . The ratio of the acceleration due to gravity on the surfaces of the moon and earth, is :
jeemain
physics
past papers
2000
34
asked
Dec 19, 2018
by
pady_1
0
answers
A particle falls from a height 'h' upon a fixed horizontal plane and rebounds. If 'e' is the coefficient of restitution, the total distance travelled before rebound-ing has stopped is :
jeemain
physics
past papers
2001
34
asked
Dec 11, 2018
by
pady_1
0
answers
If there are $n$ capacitors in parallel connected to $V$ volt source, then the energy stored is equal to :
jeemain
physics
past papers
2002
34
asked
Dec 11, 2018
by
pady_1
0
answers
The escape velocity for a body projected vertically upwards from the surface of earth is $11\; km/s$. If the body is projected at an angle of $45^{\circ}$ with the vertical, the escape velocity will be :
jeemain
physics
past papers
2003
34
asked
Dec 11, 2018
by
pady_1
0
answers
Tangents are drawn to the hyperbola $4x^2 - y^2 = 36$ at the points P and Q. If these tangents intersect at the point $T(0,3)$ then the area (in sq. units) of $\Delta PTQ$ is :
jeemain
math
past papers
2018
34
asked
Dec 11, 2018
by
pady_1
1
answer
The moment of inertia of a uniform cylinder of length $l$ and radius $R$ about its perpendicular bisector is $I$. What is the ratio $l/R$ such that the moment of inertia is minimum ?
jeemain
physics
past papers
2017
34
asked
Dec 11, 2018
by
pady_1
0
answers
The species in which the N atom is in a state of sp hybridization is :
jeemain
chemistry
past papers
2016
34
asked
Dec 11, 2018
by
pady_1
0
answers
After understanding the assertion and reason, choose the correct option. <br> Assertion : In the bonding molecular orbital (MO) of $H_2$ , electron density is increased between the nuclei. <br> Reason : The bonding MO is $\Psi_A + \Psi_B$ , which shows destructive interference of the combining electron waves
jeemain
chemistry
past papers
2015
34
asked
Dec 11, 2018
by
pady_1
0
answers
If $[ \overrightarrow{a} \times \overrightarrow{b} \; \overrightarrow{ b} \times \overrightarrow{c } \; \overrightarrow{c} \times \overrightarrow{a} ] = \lambda [ \overrightarrow{a} \; \overrightarrow{b} \; \overrightarrow{c} ]^2$ , then $\lambda$ is equal to
jeemain
math
past papers
2014
34
asked
Dec 11, 2018
by
pady_1
1
answer
A ray of light along $x + \sqrt{3}y = \sqrt{3}$ gets reflected upon reaching x-axis , the equation of the reflected rays is
jeemain
math
past papers
2013
34
asked
Dec 11, 2018
by
pady_1
1
answer
An electromagnetic wave in vacuum has the electric and magnetic fields $\overrightarrow{E}$ and $\overrightarrow{B}$, which are always perpendicular to each other. The direction of polarization is given by $\overrightarrow{X}$ and that of wave propagation by $\overrightarrow{k}$. Then :
jeemain
physics
past papers
2012
34
asked
Dec 11, 2018
by
pady_1
0
answers
$ \displaystyle{\lim_{x \to 2} ( \frac{\sqrt{1-\cos \{ 2 (x-2) \} }}{x-2} } )$
jeemain
math
past papers
2011
34
asked
Dec 11, 2018
by
pady_1
0
answers
Statement-1 : When ultraviolet light is incident on a photocell, its stopping potential is $V_0$ and the maximum kinetic energy of the photoelectrons is $K_{max}$. When the ultraviolet light is replaced by X- rays, both V0 and Kmax increase. Statement-2 : Photoelectrons are emitted with speeds ranging from zero to a maximum value because of the range of frequencies present in the incident light.
jeemain
physics
past papers
2010
34
asked
Dec 11, 2018
by
pady_1
0
answers
The alkene that exhibits geometrical isomerism is :
jeemain
chemistry
past papers
2009
34
asked
Nov 29, 2018
by
pady_1
0
answers
27. Let A be a square matrix all of whose entries are integers. Then which one of the following is true?
jeemain
math
past papers
2008
34
asked
Nov 29, 2018
by
pady_1
0
answers
Let $F(x) = f(x) + f (\frac{1}{x}), f(x) = \int_1^x \frac{ \log t}{1 + t} dt$. Then $F(e)$ equals :
jeemain
math
past papers
2007
34
asked
Nov 29, 2018
by
pady_1
0
answers
In a Wheatstone's bridge, three resistances P, Q and R are connected in the three arms and the fourth arm is formed by two resistances $S_1$ and $S_2$ connected in parallel. The condition for the bridge to be balanced will be :
jeemain
physics
past papers
2006
34
asked
Nov 13, 2018
by
pady_1
0
answers
Let $\alpha$ and $\beta$ be the distinct roots of $ax^2 + bx + c = 0 $, then $\displaystyle{\lim_{x \to \alpha} \frac{1- \cos (ax^2 + bx + c)}{(x-\alpha)^2}}$ is equal to :
jeemain
math
past papers
2005
34
asked
Nov 5, 2018
by
pady_1
0
answers
The figure shows a system of two concentric spheres of radii $r_1$ and $r_2$ and kept at temperature $T_1$ and $T_2$, respectively. The radical rate of flow of heat in a substance between the two concentric spheres, is proportional to : <br>
jeemain
physics
past papers
2005
34
asked
Nov 5, 2018
by
pady_1
0
answers
If $2a + 3b + 6c = 0$, then at least one root of the equation $ax^2 + bx +c =0$ lies in the interval
jeemain
math
past papers
2004
34
asked
Nov 5, 2018
by
pady_1
0
answers
Which one of the following statements is incorrect ?
neet
physics
past papers
2018
34
asked
Aug 21, 2018
by
pady_1
1
answer
Correct increasing order for the wavelengths of absorption in the visible region for the complexes of $Co^{3+}$ is -
neet
chemistry
past papers
2017
34
asked
Aug 21, 2018
by
pady_1
1
answer
$MY$ and $NY_3$, two nearly insoluble salts, have the same KSP values of $6.2 \times 10^{–13}$ at room temperature. Which statement would be true in regard to $MY$ and $NY_3$ ?
neet
chemistry
past papers
2016
34
asked
Aug 21, 2018
by
pady_1
1
answer
In an $S_N1$ reaction on chiral centres, there is -
neet
chemistry
past papers
2015
34
asked
Aug 21, 2018
by
pady_1
1
answer
Light with an energy flux of $25 \times 10^4\; wm^{-2}$ falls on a perfectly reflecting surface at normal incidence. If the surface area is $15\; cm^2$ , the average force exerted on the surface is:
neet
physics
past papers
2014
34
asked
Aug 20, 2018
by
pady_1
1
answer
Ratio of longest wave lengths corresponding to Lyman and Balmer series in hydrogen spectrum is -
neet
physics
past papers
2013
34
asked
Aug 20, 2018
by
pady_1
1
answer
An alternating electric field, of frequency v, is applied across the dees (radius = R) of a cyclotron that is being used to accelerated protons (mass = m). The operating magnetic field (B) used in the cyclotron and the kinetic energy (K) of the proton beam, produced by it, are given by
neet
physics
past papers
2012
34
asked
Aug 20, 2018
by
pady_1
1
answer
Sound waves travel at $350 m/s$ through brass. The wavelength of a 700 Hz acoustic wave as it enters brass from wave air :
neet
physics
past papers
2011
34
asked
Aug 16, 2018
by
pady_1
1
answer
An alpha nucleus of energy $\frac{1}{2} mv^2$ bombards a 2 heavy nuclear target of charge Ze. Then the distance of closest approach for the alpha nucleus will be proportional to –
neet
physics
past papers
2010
34
asked
Jul 26, 2018
by
pady_1
1
answer
Power dissipated in an LCR series circuit connected to an a.c. source of emf ? is : 2
neet
physics
past papers
2009
34
asked
Jul 26, 2018
by
pady_1
1
answer
Which two of the following five physical parameters have the same dimensions ? <br> (a) Energy density (b) Refractive index (c) Dielectric constant (d) Young’s modulus (e) Magnetic field
neet
physics
past papers
2008
34
asked
Jul 26, 2018
by
pady_1
1
answer
A beam of electrons passes undeflected through mutually perpendicular electric and magnetic fields. It the electric field is switched off, and the same magnetic field is maintained, the electrons move :
neet
physics
past papers
2007
34
asked
Jul 26, 2018
by
pady_1
1
answer
The Earth is assumed to be a sphere of radius R. A platform is arranged at a height R from the surface of the Earth. The escape velocity of a body from this platform is fv, where v is its escape velocity from the surface of the Earth. The value of f is:-
neet
physics
past papers
2006
34
asked
Jul 25, 2018
by
pady_1
1
answer
A stone tied to the end of a string of 1 m long is whirled in a horizontal circle with a constant speed. If the stone makes 22 revolution in 44 seconds, what is the magnitude and direction of acceleration of the stone-
neet
physics
past papers
2005
34
asked
Jul 24, 2018
by
pady_1
2
answers
A block of mass m is placed on a smooth wedge of inclination $\theta$. The whole system is accelerated horizontally so that the block does not slip on th wedge. The force exerted by the wedge on the block (g is acceleration due to gravity) will be :-
neet
physics
past papers
2004
34
asked
Jul 24, 2018
by
pady_1
1
answer
Fuse wire is a wire of
neet
physics
past papers
2003
34
asked
Jul 24, 2018
by
pady_1
1
answer
In a PN junction : -
neet
physics
past papers
2002
34
asked
Jul 23, 2018
by
pady_1
0
answers
If specific resistance of a potentiometer wire is $10^{-7} \Omega m$ and current flow through it is 0.1 A, cross-sectional area of wire is $10^{-6} m^2$ then potential gradient will be :-
neet
physics
past papers
2001
34
asked
Jul 20, 2018
by
pady_1
1
answer
If $\overrightarrow{F}$ = $(60 \hat{i} + 15 \hat{j} – 3 \hat{k} ) N $ and $\overrightarrow{V }= (2 \hat{i} – 4\hat{j} + 5 \hat{k} ) m/s$, then instantaneous power is :
neet
physics
past papers
2000
34
asked
Jul 20, 2018
by
pady_1
0
answers
If the frequency of a spring is n after suspending mass M, now 4M mass is suspended from spring then the frequency will be :
neet
physics
past papers
1998
34
asked
Jun 15, 2018
by
pady_1
1
answer
Vincent unpacked 31 kilograms of pineapples and apples. The pineapples came in 8-kilogram bags and the apples came in 7-kilogram bags. In all, Vincent unpacked 4 bags of fruit. How many bags of pineapples and bags of apples did he unpack?
class5
math
olympiad
logical
analytical
reasoning
34
asked
Dec 31, 2015
by
pady_1
1
answer
What is the total length of the pole in centimeters if 30 cm is buried in the ground?
class5
math
olympiad
measurements
34
asked
Dec 31, 2015
by
pady_1
0
answers
$4\large\frac{1}{2}$ of 3
class5
math
olympiad
fractions
decimals
34
asked
Dec 31, 2015
by
pady_1
0
answers
What % is 250 of 1200?
class5
math
olympiad
computation
34
asked
Dec 31, 2015
by
pady_1
0
answers
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