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Recent questions tagged 28
Questions
Which is the correct thermal stability order for$H_2E$ (E=O, S, Se, Te and Po) ?
neet
chemistry
past papers
2019
28
asked
Jul 8, 2019
by
pady_1
1
answer
A man stands in front of a hillock and fires a gun. He hears an echo after 1.5 s. The distance of the hillock from the man is (velocity of sound in air is 330 m/s) :
jeemain
physics
past papers
1998
28
asked
Dec 19, 2018
by
pady_1
0
answers
The relation between melting point of ice and pressure is shown by ice line, which will be :
jeemain
physics
past papers
1999
28
asked
Dec 19, 2018
by
pady_1
0
answers
A body of mass $m_1$ moving with a velocity $10\;ms^{-1}$ collides with another body at rest of mass $m_2$. After collision the velocities of the two bodies are $2\;ms^{-1}$ and $5 \; ms^{-1}$ respectively, along the direction of motion of $m_1$. The ratio $\frac{m_1}{m_2}$ is :
jeemain
physics
past papers
2000
28
asked
Dec 19, 2018
by
pady_1
0
answers
Consider the following statements A and B and identify the correct choice in the given answers. <br> A. Tightly bound electrons of target material scatter X-ray photon, resulting in the Compton effect. <br> B. Photoelectric effect takes place with free electrons.
jeemain
physics
past papers
2001
28
asked
Dec 11, 2018
by
pady_1
0
answers
Which of the following are not electromagnetic waves ?
jeemain
physics
past papers
2002
28
asked
Dec 11, 2018
by
pady_1
0
answers
A marble block of mass 2 kg lying on ice when given a velocity of 6 m/s is stopped by friction in 10 s. Then the coefficient of friction is :
jeemain
physics
past papers
2003
28
asked
Dec 11, 2018
by
pady_1
0
answers
All the graph are intendent to represent the same motion. One of them does it incorrectly. Pick it up
jeemain
physics
past papers
2018
28
asked
Dec 11, 2018
by
pady_1
0
answers
The radius of a circle, having minimum area, which touches the curve $y = 4 - x^2$ and the lines, $y = |x|$ is
jeemain
math
past papers
2017
28
asked
Dec 11, 2018
by
pady_1
1
answer
In an experiment for determination of refractive index of glass of a prism by $i− \delta$, plot, it was found that a ray incident at angle $35^{\circ}$, suffers a deviation of $40^{\circ}$ and that it emerges at angle $79^{\circ}$ ⋅ Ιn that case which of the following is closest to the maximum possible value of the refractive index ?
jeemain
physics
past papers
2016
28
asked
Dec 11, 2018
by
pady_1
0
answers
If one were to apply Bohr model to a particle of mass $'m'$ and charge $'q'$ moving in a plane under the influence of a magnetic field $'B'$, the energy of the charged particle in the $n^{th}$ level will be :
jeemain
physics
past papers
2015
28
asked
Dec 11, 2018
by
pady_1
0
answers
On heating water, bubbles being formed at the bottom of the vessel detach and rise. Take the bubbles to be spheres of radius R and making a circular contact of radius r with the bottom of the vessel. If r < < R, and the surface tension of water is T, value of r just before bubbles detach is : (density of water is $\rho_w$) <br>
jeemain
physics
past papers
2014
28
asked
Dec 11, 2018
by
pady_1
0
answers
Energy of an electron is given by $E= -2.178 \times 10^{18} J \bigg(\large\frac{Z^2}{n^2}\bigg)$. Wavelength of light required to excite an electron in an hydrogen atom from level $n = 1$ to $n = 2$ will be
jeemain
chemistry
past papers
2013
28
asked
Dec 11, 2018
by
pady_1
0
answers
Consider the function $f(x) = |x-2| + |x-5|, x \in R$. <br> Statement 1: $f'(4) = 0$ <br> Statement 2 : $f$ is continuous in [2, 5], differentiable in (2, 5) and $f(2) = f(5)$.
jeemain
math
past papers
2012
28
asked
Dec 11, 2018
by
pady_1
0
answers
100 g of water is heated from $30^{\circ}C$ to $50^{\circ}C$. Ignoring the slight expansion of the water, the change in its internal energy is (specific heat of water is 4148 J/Kg/K) :
jeemain
physics
past papers
2011
28
asked
Dec 11, 2018
by
pady_1
0
answers
The correct order of $E^0_{M^2/M}$ values with negative sign for the four successive elements $Cr,Mn,Fe$
jeemain
chemistry
past papers
2010
28
asked
Dec 11, 2018
by
pady_1
0
answers
Assuming the gas to be ideal the work done on the gas in taking it from A to B is
jeemain
physics
past papers
2009
28
asked
Nov 29, 2018
by
pady_1
0
answers
The differential equation of the family of circles with fixed radius 5 units and centre on the line y = 2 is
jeemain
math
past papers
2008
28
asked
Nov 29, 2018
by
pady_1
0
answers
The equation of a tangent to the parabola $y^2 = 8x$ is $ y = x + 2$. The point on this line from which the other tangent to the parabola is perpendicular to the given tangent is :
jeemain
math
past papers
2007
28
asked
Nov 29, 2018
by
pady_1
0
answers
The resistance of a bulb filament is $100 \Omega$ at a temperature of $100^{\circ}$C. If its temperature coefficient of resistance be $0.005 \; per \; ^{\circ}C$, its resistance will become $200 \Omega$ at a temperature of :
jeemain
physics
past papers
2006
28
asked
Nov 13, 2018
by
pady_1
0
answers
If $x = \displaystyle\sum_{n=0}^{\alpha} a^n,y=\displaystyle\sum_{n=0}^{\alpha} b^n,z= \displaystyle\sum_{n=0}^{\alpha} c^n$ where $a, b, c$ are in AP and $|a| < 1, |b| < 1, |c|<1$, then $x, y, z$ are in :
jeemain
math
past papers
2005
28
asked
Nov 5, 2018
by
pady_1
0
answers
The intensity of gamma radiation from a given source is $I$. On passing through 36 mm of lead, it is reduced to $\frac{I}{8}$. The thickness of lead, which will reduce the intensity to$\frac{I}{2}$ will be :
jeemain
physics
past papers
2005
28
asked
Nov 5, 2018
by
pady_1
0
answers
If $\displaystyle\sum_{x \to \alpha} \begin{pmatrix}1 + \frac{a}{x} + \frac{b}{x^2} \end{pmatrix}^{2x} = e^2 $ then the values of $a$ and $b$, are
jeemain
math
past papers
2004
28
asked
Nov 5, 2018
by
pady_1
0
answers
A solid sphere is rotating freely about its symmetry axis in free space. The radius of the sphere is increased keeping its mass same. Which of the following physical quantities would remain constant for the sphere?
neet
physics
past papers
2018
28
asked
Aug 21, 2018
by
pady_1
1
answer
Consider the reactions : <br> Identify A, X, Y and Z
neet
chemistry
past papers
2017
28
asked
Aug 21, 2018
by
pady_1
1
answer
Equal moles of hydrogen and oxygen gases are placed in a container with a pin-hole through which both can escape. What fraction of the oxygen escapes in the time required for one-half of the hydrogen to escape ?
neet
chemistry
past papers
2016
28
asked
Aug 21, 2018
by
pady_1
1
answer
The stability of +1 oxidation state among Al, Ga, In and Tl in creases in the sequence -
neet
chemistry
past papers
2015
28
asked
Aug 21, 2018
by
pady_1
1
answer
A potentiometer circuit has been set up for finding the internal resistance of a given cell. The main battery, used across the potentiometer wire, has an emf of 2.0 V and a negligible internal resistance. The potentiometer wire itself is 4 m long. When the resistance, R, connected acrose the given cell, has values of. <br> (i) infinity $\; \; \; \; \; \; $ (ii) 9.5 Q <br> The 'balancing lengths, on the potentiometer wire are found to be 3m and 2.85 m, respectively. <br> The value of internal resistance of the cell is:
neet
physics
past papers
2014
28
asked
Aug 20, 2018
by
pady_1
1
answer
When a proton is released from rest in a room, it starts with an initial acceleration $a_0$ towards west. When it is projected towards north with a speed $v_0$ it moves with an initial acceleration $3a_0$ toward west. The electric and magnetic fields in the room are -
neet
physics
past papers
2013
28
asked
Aug 20, 2018
by
pady_1
1
answer
What is the flux through a cube of side 'a' if a point charge of q is at one of its corner.
neet
physics
past papers
2012
28
asked
Aug 20, 2018
by
pady_1
1
answer
An ac voltage is applied to a resistance R and the inductive reactance are both equal to $3 \Omega$, the phase difference between the applied voltage and the current in the circuit is :
neet
physics
past papers
2011
28
asked
Aug 16, 2018
by
pady_1
1
answer
A gramophone record is revolving with angular velocity $\omega$. A coin is placed at a distance r from the centre of the record. The static coefficient of friction is µ. The coin will revolve with the record if –
neet
physics
past papers
2010
28
asked
Jul 26, 2018
by
pady_1
1
answer
The magnetic force acting on a charged particle a of charge – 2µc in a magnetic field of 2T acting in y direction, when the particle velocity is $(2\widehat{i} + 3\widehat{j})\times 10^5ms^-1$, is :
neet
physics
past papers
2009
28
asked
Jul 26, 2018
by
pady_1
1
answer
Water falls from a height of 60 m at the rate of 15 kg/s to operate a turbine. The losses due to frictional forces are 10 % of energy. How much power is generated by the turbine ? (g = 10${\frac{m}{s}}^ 2$)
neet
physics
past papers
2008
28
asked
Jul 26, 2018
by
pady_1
1
answer
A steady current of $1.5$ amp flows through a copper voltameter for 10 minutes. If the electrochemical equivalent of copper is $30 \times 10^{–5}$ gm $coulomb^{–1}$, the mass of copper deposited on the electrode will be: -
neet
physics
past papers
2007
28
asked
Jul 26, 2018
by
pady_1
1
answer
A coil of inductive reactance $31\Omega$ has a resistance of $8\Omega$. It is placed in series with a condenser of capacity reactance $25\Omega$. The combination is connected to an a.c. source of 110 volt. The power factor of the circuit is:-
neet
physics
past papers
2006
28
asked
Jul 25, 2018
by
pady_1
1
answer
In any fission process the ratio mass of fission products is- mass of parent nucleus
neet
physics
past papers
2005
28
asked
Jul 24, 2018
by
pady_1
1
answer
A round disc of moment of inertia $I_2$ about its axis perpendicular to its plane and passing through its centre is placed over another disc of moment of inertia $I_1$ rotating with an angular velocity $\omega$ about the same axis. The final angular velocity of the combination of discs is :-
neet
physics
past papers
2004
28
asked
Jul 24, 2018
by
pady_1
1
answer
A bar magnet is oscillating in the Earth's magnetic field with a period T. What happens to this period and motion if this mass is quadrupled -
neet
physics
past papers
2003
28
asked
Jul 24, 2018
by
pady_1
2
answers
A particle (A) is droped from a height and another particle (B) is projected in horizontal direction with speed of 5 m/s from the same height then correct statement is : -
neet
physics
past papers
2002
28
asked
Jul 23, 2018
by
pady_1
1
answer
In Thomson mass spectrograph $\overrightarrow{E} \bot \overrightarrow {B}$ then the velocity of underflected electron beam will be :
neet
physics
past papers
2001
28
asked
Jul 20, 2018
by
pady_1
1
answer
The equations of two waves given as $X=acos(\omega t+\delta)$ and $X=acos(\omega t+ \alpha)$, Where $\delta=\alpha+\frac{\pi}{2}$, then resultant wave represent :
neet
physics
past papers
2000
28
asked
Jul 20, 2018
by
pady_1
0
answers
When volume changes from V to 2V at constant pressure(P) then the change in internal energy will be :
neet
physics
past papers
1998
28
asked
Jun 15, 2018
by
pady_1
1
answer
For breakfast, Bella bought a muffin for ₹44.00 and a cup of coffee for ₹115.50. For lunch, Bella had soup, a salad, and lemonade. The soup cost ₹177.50, the salad cost ₹475.50, and the lemonade cost ₹91.50. How much more money did Bella spend on lunch than on breakfast?
class5
math
olympiad
logical
analytical
reasoning
28
asked
Dec 31, 2015
by
pady_1
0
answers
The following bar chart shows the number of fruits in a shop, There are _______ less oranges than pomegranates.
class5
math
olympiad
data handling
28
asked
Dec 31, 2015
by
pady_1
0
answers
Find the area of a rectangle of length 15 mm and breadth 7 mm.
class5
math
olympiad
measurements
28
asked
Dec 31, 2015
by
pady_1
0
answers
$2 \large\frac{1}{7} \div \large\frac{7}{2}$
class5
math
olympiad
fractions
decimals
28
asked
Dec 31, 2015
by
pady_1
0
answers
A team won 80\% of the 15 games played by it. How many games did it win? How many games did it loss?
class5
math
olympiad
computation
28
asked
Dec 31, 2015
by
pady_1
0
answers
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