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Recent questions tagged 13
Questions
Which mixture of the solutions will lead to the formation of negatively charged colloidal $[AgI] I^{-}$ sol. ?
neet
chemistry
past papers
2019
13
asked
Jul 8, 2019
by
pady_1
1
answer
The maximum speed with which a car can be driven round a curve of radius 18 m without skidding (when $g = 10\;m/s^2$ and the coefficient of friction between rubber tyres and the roadway is $0.2$ ) is :
jeemain
physics
past papers
1998
13
asked
Dec 19, 2018
by
pady_1
0
answers
A body takes $1 \frac{1}{3}$ times as much time to slide down a rough inclined plane as it takes to slide down an indentical but smooth inclined plane. If the angle of inclined plane is $45^{\circ}$, the coefficient of friction is:
jeemain
physics
past papers
1999
13
asked
Dec 19, 2018
by
pady_1
0
answers
Two wires of equal diameters of resistivities $\rho_1$ and $\rho_2$ and lengths $x_1$ and $x_2$ respectively are joined in series. The equivalent resistivity of the combination is :
jeemain
physics
past papers
2000
13
asked
Dec 19, 2018
by
pady_1
0
answers
In the visible region the dispersive powers and the mean angular deviations for crown and flint glass prisms are $\omega,\; \omega' $ and $d, \; d'$ respectively. The condition of getting dispersion wih zero deviation, when the two prisms are combined is :
jeemain
physics
past papers
2001
13
asked
Dec 11, 2018
by
pady_1
0
answers
A wave $y =a \sin (wt-kx)$ on a string meets with another wave producing a node at $x=0$. Then the equation of the unknown wave is :
jeemain
physics
past papers
2002
13
asked
Dec 11, 2018
by
pady_1
0
answers
Dimensions of $\frac{1}{\mu_0 \varepsilon_0}$, where symbols have their usual meaning, are :
jeemain
physics
past papers
2003
13
asked
Dec 11, 2018
by
pady_1
0
answers
For an RLC circuit driven with voltage of amplitude $v_m$ and frequency $\omega_o = \frac{1}{\sqrt{LC}}$ the current exhibits resonance. The quality factor, Q is given by :
jeemain
physics
past papers
2018
13
asked
Dec 11, 2018
by
pady_1
0
answers
If $A = \begin{bmatrix} 2 & -3 \\ -4 & 1 \end{bmatrix}$, then $adj (3A^2 + 12A)$ is equal to :
jeemain
math
past papers
2017
13
asked
Dec 11, 2018
by
pady_1
1
answer
A combination of capacitors is set up as shown in the figure. The magnitude of the electric field, due to a point charge Q (having a charge equal to the sum of the charges on the $4\; \mu F$ and $9\; \mu F$ capacitors), at a point distant 30 m from it, would equal : <br>
jeemain
physics
past papers
2016
13
asked
Dec 11, 2018
by
pady_1
0
answers
A bat moving at $10 \;ms^{-1}$ towards a wall sends a sound signal of $8000\; Hz$ towards it. On reflection it hears a sound of frequency f. The value of f in Hz is close to (speed of sound = $320 \;ms^{-1}$ )$
jeemain
physics
past papers
2015
13
asked
Dec 11, 2018
by
pady_1
0
answers
The forward biased diode connection is:
jeemain
physics
past papers
2014
13
asked
Dec 11, 2018
by
pady_1
0
answers
A compound with molecular mass 180 is acylated with $CH_2COCl$ to get a compound with molecular mass 390. The number of amino groups present per molecule of the former compound is :
jeemain
chemistry
past papers
2013
13
asked
Dec 11, 2018
by
pady_1
0
answers
If the line $2x + y = k$ passes through the point which divides the line segment joining the points (1, 1) and (2, 4) in the ratio $ 3 : 2$, then $k$ equals
jeemain
math
past papers
2012
13
asked
Dec 11, 2018
by
pady_1
1
answer
A current I flows in an infinitely long wire with cross section in the form of a semicircular ring of radius R. The magnitude of the magnetic induction along its axis is
jeemain
physics
past papers
2011
13
asked
Dec 11, 2018
by
pady_1
0
answers
Consider the following bromides : The correct order of $S_N1$0 reactivity is
jeemain
chemistry
past papers
2010
13
asked
Dec 11, 2018
by
pady_1
0
answers
Due to the presence of the current I, at the origin
jeemain
physics
past papers
2009
13
asked
Nov 29, 2018
by
pady_1
0
answers
The vector $\overrightarrow{a}=\alpha \hat{i}+2\hat{j}+\beta \hat{k}$ lies in the plane of the vectors $\overrightarrow{b}=\hat{i}+\hat{j}\; and \overrightarrow{c}=\hat{j}+\hat{k}$ and bisects the angle between $\overrightarrow{b}$ and $\overrightarrow{c}$.Then which one of the following gives possible values of $\alpha$ and $\beta$ ?
jeemain
math
past papers
2008
13
asked
Nov 29, 2018
by
pady_1
0
answers
The sum of the series <br> $^{20}C_0 - ^{20}C_1 + ^{20}C_2 - ^{20}C_3 + . . . .- . . . . + ^{20}C_{10}$ is :
jeemain
math
past papers
2007
13
asked
Nov 29, 2018
by
pady_1
0
answers
Assuming the Sun to be a spherical body of radius R at a temperature of T K, evaluate the total radiant power, incident on earth, at a distance r from the Sun : <br> where $r_0$ is the radius of the earth and $\sigma$ is Stefan's constant .
jeemain
physics
past papers
2006
13
asked
Nov 13, 2018
by
pady_1
0
answers
If the letters of the word SACHIN are arranged in all possible ways and these words are written out as in dictionary, then the word SACHIN appears at serial number :
jeemain
math
past papers
2005
13
asked
Nov 5, 2018
by
pady_1
0
answers
A body A of mass M while falling vertically downwards under gravity breaks into two parts; a body B of mass $\frac{1}{3} M$ and, a body C of mass $\frac{2}{3}M$. The centre of mass of body B and C taken together shifts compared to that of body A towards :
jeemain
physics
past papers
2005
13
asked
Nov 5, 2018
by
pady_1
0
answers
The number of ways of distributing 8 identical balls in 3 distinct boxes so that none of the boxes is empty is
jeemain
math
past papers
2004
13
asked
Nov 5, 2018
by
pady_1
0
answers
An em wave id propagating in a medium with a velocity $\overrightarrow{V} = V \hat{i}$. The instantaneous oscillating electric field of this em wave is along +y axis. Then the direction of oscillating magnetic field of the em wave will be along
neet
physics
past papers
2018
13
asked
Aug 21, 2018
by
pady_1
1
answer
In which pair of ions both the species contain S – S bond?
neet
chemistry
past papers
2017
13
asked
Aug 21, 2018
by
pady_1
1
answer
The correct statement regarding a carbonyl compound with a hydrogen atom on its alpha-carbon, is:
neet
chemistry
past papers
2016
13
asked
Aug 21, 2018
by
pady_1
1
answer
In which of the following pairs, both the species are not isostructural ?
neet
chemistry
past papers
2015
13
asked
Aug 21, 2018
by
pady_1
1
answer
Copper of fixed volume 'V' is drawn into wire of length $'\lambda'$. When this wire is subjected to a constant force 'F', the extension produced in the wire is $'\Delta \ell'$ . Which of the following graph is a straight line ?
neet
physics
past papers
2014
13
asked
Aug 20, 2018
by
pady_1
1
answer
The wettability of a surface by a liquid depends primarily on -
neet
physics
past papers
2013
13
asked
Aug 20, 2018
by
pady_1
1
answer
A geostationary satellite is orbiting the earth at a height of 5R above that surface of the earth, R being the radius of the earth. The time period of another satellite of the earth. The time period of another satellite in hours at a height of 2R from the surface of the earth is
neet
physics
past papers
2012
13
asked
Aug 20, 2018
by
pady_1
1
answer
A missile is fired for maximu range with an initial velocity of 20 m/s. If $g = 10\; m/s^2$ , the range of the missile is :
neet
physics
past papers
2011
13
asked
Aug 16, 2018
by
pady_1
1
answer
A transverse wave is represented by y = A sin ($\omega t -Kx$). For what value of the wavelength is the wave velocity equal to the maximum particle velocity –
neet
physics
past papers
2010
13
asked
Jul 26, 2018
by
pady_1
1
answer
An engine pumps water continuously through a hose. Water leaves the hose with a velocity v an m is the mass per unit length of the water jet. What is the rate which kinetic energy is imparted to water ?
neet
physics
past papers
2009
13
asked
Jul 26, 2018
by
pady_1
1
answer
In the phenomenon of electric discharge through gases at low pressure, the coloured glow in the tube appears as a result of -
neet
physics
past papers
2008
13
asked
Jul 26, 2018
by
pady_1
1
answer
Two satellites of earth, $S_1$ and $S_2$, are moving in the same orbit. The mass of $S_1$ is four times the mass of $S_2$. Which one of the following statements is true ?
neet
physics
past papers
2007
13
asked
Jul 26, 2018
by
pady_1
2
answers
The potential energy of a long spring when stretched by 2 cm is U. If the spring is stretched by 8 cm the potential energy stored in it is:-
neet
physics
past papers
2006
13
asked
Jul 25, 2018
by
pady_1
2
answers
Two vibrating tuning forks produce progressive waves given by $y_1=4\;sin\; 500\; \pi t$ and $y_2=2\;sin\;506\; \pi t$ Number of beats produced per minute is
neet
physics
past papers
2005
13
asked
Jul 24, 2018
by
pady_1
1
answer
The refractive index of the material of a prism is $\sqrt 2$and its refracting angle is 30º. One of the refracting surfaces of the prism is made a mirror inwards. A beam of monochromatic light entering the prism from the other face will retrace its path after reflection form the mirrored surface if its angle of incidence on the prism is
neet
physics
past papers
2004
13
asked
Jul 24, 2018
by
pady_1
1
answer
A man throws ball with the same speed vertically upwards one after the other at an interval of 2 seconds. What should be the speed of the throw so that more than two balls are in the sky at any time ? (Given $g = 9.8 m/s^2$)
neet
physics
past papers
2003
13
asked
Jul 24, 2018
by
pady_1
1
answer
A solid sphere of radius R is placed on smooth horizontal surface. A horizontal force 'F' is applied at height 'h' from the lowest point. For the maximum, acceleration of centre of mass, which is correct : -
neet
physics
past papers
2002
13
asked
Jul 23, 2018
by
pady_1
1
answer
A charge Q $\mu c$ is placed at the centre of cube, the flux coming out from any surfaces will be :-
neet
physics
past papers
2001
13
asked
Jul 20, 2018
by
pady_1
1
answer
For a plane convex lenx $(\mu = 1.5)$ has radius of curvature 10 cm. It is silvered on its plane surface. Find focal length after silvering :
neet
physics
past papers
2000
13
asked
Jul 20, 2018
by
pady_1
1
answer
If the light of wavelength $\lambda$ is incident on metal surface, the ejected fastest electron has speed v. If the wavelength is changed to $\frac {3\lambda} {4}$ , the speed 4 of the fastest emitted electron will be :
neet
physics
past papers
1998
13
asked
Jun 15, 2018
by
pady_1
1
answer
Which type of graph would best show the number of cars sold in four different colours?
class5
math
olympiad
data handling
13
asked
Dec 31, 2015
by
pady_1
1
answer
Find the area of a rectangle of length 24 cm and breadth 13 cm.
class5
math
olympiad
measurements
13
asked
Dec 31, 2015
by
pady_1
0
answers
Shweta and Ram have bookshelves of the same size and holding books of the same sizes. Shweta's shelf is $\large\frac{3}{4}$ full and Ram's shelf is $\large\frac{8}{11}$ full. If 115 more books of the same size are distributed among them, then they can fill their shelves completely. How many books does Ram have today?
class5
math
olympiad
fractions
decimals
13
asked
Dec 31, 2015
by
pady_1
0
answers
The population of a village is 2400. If 12\% were children, find the number of adults.
class5
math
olympiad
computation
13
asked
Dec 31, 2015
by
pady_1
1
answer
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