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Recent questions tagged 31
Questions
Enzymes that utilize ATP in phosphate transfer require an alkaline earth metal (M) as the cofactor.M is :
neet
chemistry
past papers
2019
31
asked
Jul 8, 2019
by
pady_1
1
answer
In the achromatic prism, we have :
jeemain
physics
past papers
1998
31
asked
Dec 19, 2018
by
pady_1
0
answers
A car with a horn of frequency $620\;Hz$, travels towards a large wall with a speed $20\;m/s$. If velocity of sound is $330\;m/s$ the frequency of echo of sound of horn as heard by driver :
jeemain
physics
past papers
1999
31
asked
Dec 19, 2018
by
pady_1
0
answers
A body is sliding down an inclined plane having coefficient of friction 0.5. If the normal reaction is twice that of the resultant downward force along the incline the angle between the inclined plane and the horizontal is :
jeemain
physics
past papers
2000
31
asked
Dec 19, 2018
by
pady_1
0
answers
In CGS system magnitude of the force is 100 dynes . In another system where the fundamental physical quantities are kilogram, meter and minute, the magnitude of the force is :
jeemain
physics
past papers
2001
31
asked
Dec 11, 2018
by
pady_1
0
answers
Infrared radiations are detected by :
jeemain
physics
past papers
2002
31
asked
Dec 11, 2018
by
pady_1
0
answers
A block of mass M is pulled along a horizontal frictionless surface by a rope of mass m. If a force P is applied at the free end of the rope, the force exerted by the rope on the block is :
jeemain
physics
past papers
2003
31
asked
Dec 11, 2018
by
pady_1
0
answers
If the tangent at (1, 7) to the curve $x^2 = y - 6$ touches the circle $x^2 + y^2 + 16x +12 y + c = 0$ then the value of $c$ is :
jeemain
math
past papers
2018
31
asked
Dec 11, 2018
by
pady_1
1
answer
A radioactive nucleus A with a half life T, decays into a nucleus B. At t = 0, there is no nucleus B. At sometime t, the ratio of the number of B to that of A is 0.3. Then, t is given by :
jeemain
physics
past papers
2017
31
asked
Dec 11, 2018
by
pady_1
0
answers
At $300\; K$ and $1 \;atm$, $15\; mL$ of a gaseous hydrocarbon requires $375\; mL$ air containing $20\%\; O_2$ by volume for complete combustion. After combustion the gases occupy $330\; mL$. Assuming that the water formed is in liquid form and the volumes were measured at the same temperature and pressure, the formula of the hydrocarbon is :
jeemain
chemistry
past papers
2016
31
asked
Dec 11, 2018
by
pady_1
0
answers
A sample of a hydrate of barium chloride weighing 61 g was heated until all the water of hydration is removed. The dried sample weighed $52\; g$. The formula of the hydrated salt is : (atomic mass, $Ba=137 \;amu,\; Cl = 35.5 \;amu$)
jeemain
chemistry
past papers
2015
31
asked
Dec 11, 2018
by
pady_1
0
answers
The image of the line $\frac{x-1}{3} = \frac{y-3}{1} = \frac{z-4}{-5}$ in the plane $2x-y+z+3 = 0$ is the line
jeemain
math
past papers
2014
31
asked
Dec 11, 2018
by
pady_1
1
answer
The circle passing through (1, -2) and touching the axis of $x$ at $(3, 0)$ also passes through the point
jeemain
math
past papers
2013
31
asked
Dec 11, 2018
by
pady_1
1
answer
A wooden wheel of radius $R$ is made of two semicircular parts (see figure); The two parts are held together by a ring made of a metal strip of cross sectional area $S$ and length $L$. $L$ is slightly less than $2 \pi R$. To fit the ring on the wheel, it is heated so that its temperature rises by $\Delta T$ and it just steps over the wheel. As it cools down to surrounding temperature, it presses the semicircular parts together. If the coefficient of linear expansion of the metal is $\alpha$, and its Youngs' modulus is $Y$, the force that one part of the wheel applies on the other part is : <br>
jeemain
physics
past papers
2012
31
asked
Dec 11, 2018
by
pady_1
0
answers
The lines $L_1 : y - x = 0$ an $L_2 : 2x + y =0$ intersect the line $L_3 : y + 2 = 0$ at P and Q respectively. The bisector of the acute angle between $L_1$ and $L_2$ intersect $L_3$ at R. <br> Statement-1 : The ratio PR : RQ equals $2\sqrt{2}:\sqrt{5}$. <br> Statement -2 : In any triangle, bisector of an angle divides the triangle into two similar triangles.
jeemain
math
past papers
2011
31
asked
Dec 11, 2018
by
pady_1
0
answers
A rectangular loop has a sliding connector PQ of length A and resistance $R \Omega$ and it is moving with a speed v as shown. The set-up is placed in a uniform magnetic field going into the plane of the paper. The three currents $I_1, I_2$ and I are
jeemain
physics
past papers
2010
31
asked
Dec 11, 2018
by
pady_1
0
answers
Knowing that the Chemistry of lanthanoids (Ln) is dominated by its $+3$ oxidation state, which of the following statements is incorrect ?
jeemain
chemistry
past papers
2009
31
asked
Nov 29, 2018
by
pady_1
0
answers
The value of $\sqrt{2}\displaystyle\int\frac {sin\;{x}{dx}}{sin(x-\frac{\pi}{4})}$ is
jeemain
math
past papers
2008
31
asked
Nov 29, 2018
by
pady_1
0
answers
Let $A(h, k), B(1, 1)$ and $C(2, 1)$ be the vertices of a right angled triangle with AC as its hypotenuse. If the area of the triangle is 1, then the set of values which $'k'$ can take is given by :
jeemain
math
past papers
2007
31
asked
Nov 29, 2018
by
pady_1
0
answers
A solid which is not transparent to visible light and whose conductivity increases with temperature is formed by :
jeemain
physics
past papers
2006
31
asked
Nov 13, 2018
by
pady_1
0
answers
If in a $\Delta ABC$, the altitudes from the vertices $A, B, C$ on opposite sides are in HP, then $\sin A, \sin B, \sin C$ are in :
jeemain
math
past papers
2005
31
asked
Nov 5, 2018
by
pady_1
0
answers
Starting with a sample of pure $^{66}Cu, 7/8$ of it decays into Zn in 15 min. The corresponding half life is :
jeemain
physics
past papers
2005
31
asked
Nov 5, 2018
by
pady_1
0
answers
A point on the parabola $y^2 =18 x$ at which the ordinate increases at twice the rate of the abscissa is
jeemain
math
past papers
2004
31
asked
Nov 5, 2018
by
pady_1
0
answers
A block of mass m is placed on a smooth inclined wedge ABC of inclination $\theta$ as shown in the figure. The wedge is given as acceleration 'a' towards the right. The relation between a and $\theta$ for the block to remain stationary on the wedge is <br>
neet
physics
past papers
2018
31
asked
Aug 21, 2018
by
pady_1
1
answer
neet
chemistry
past papers
2017
31
asked
Aug 21, 2018
by
pady_1
1
answer
Which of the following has longest $C – O$ bond length ? (Free $C – O$ bond length in $CO$ is $1.128 Å$)
neet
chemistry
past papers
2016
31
asked
Aug 21, 2018
by
pady_1
1
answer
The sum of coordination number and oxidation number of the metal M in the complex $[M(en)_2(C_2O_4)]Cl$ (where en is ethylenediamine) is -
neet
chemistry
past papers
2015
31
asked
Aug 21, 2018
by
pady_1
1
answer
Two identical long conducting wires AOB and COD are placed at right angle to each other, with one above other such that $'O'$ is their common point for the two. The wires carry $I_1$ and $I_2$ currents, respectively. Point 'I' is lying at distance 'd' from '$O$' along a direction perpendicular to the plane containing the wires. The magnetic field at the point 'P' will be :
neet
physics
past papers
2014
31
asked
Aug 20, 2018
by
pady_1
1
answer
A wire loop is rotated in a magnetic field. The frequency of change of direction of the induced e.m.f. is -
neet
physics
past papers
2013
31
asked
Aug 20, 2018
by
pady_1
2
answers
A compass needle which is allowed to move in a horizontal plane is taken to a geomagnetic pole. It.
neet
physics
past papers
2012
31
asked
Aug 20, 2018
by
pady_1
1
answer
A particle of mass m is released from rest and follows a parabolic path as shown. Assuming that the displacement of the mass from the origin is small which graph correctly depicts the position of the particles as a function of time ? <br>
neet
physics
past papers
2011
31
asked
Aug 16, 2018
by
pady_1
1
answer
The dimension of $\frac {1}{2}\epsilon_0 E^2$ , where $\epsilon_0$ is permittivity of free space and E is electric field, is –
neet
physics
past papers
2010
31
asked
Jul 26, 2018
by
pady_1
1
answer
See the electrical circuit shown in this figure. Which of the following equations is a correct equation for it ? <br>
neet
physics
past papers
2009
31
asked
Jul 26, 2018
by
pady_1
1
answer
A closed loop PQRS carrying a current is placed in a uniform magnetic field. If the magnetic forces on segments PS, SR and RQ are $F_1$ ,$ F_2$ and $F_3$ respectively and are in the plane of the paper and along the directions shown, the force on the segment QP is :
neet
physics
past papers
2008
31
asked
Jul 26, 2018
by
pady_1
1
answer
The resistance of an ammeter is $13 \Omega $ and its scale is graduated for a current upto $100$ amps. After and additional shunt has been connected to this ammeter it becomes possible to measure currents upto $750$ amperes by this meter. The value of shunt-resistance is-
neet
physics
past papers
2007
31
asked
Jul 26, 2018
by
pady_1
1
answer
The momentum of a photon of energy 1MeV in kg m/s, will be-
neet
physics
past papers
2006
31
asked
Jul 25, 2018
by
pady_1
1
answer
The angular resolution of a 10cm diameter telescope at a wavelength of 5000Å is of the order of -
neet
physics
past papers
2005
31
asked
Jul 24, 2018
by
pady_1
1
answer
$M_P$ denotes the mass of a proton and $M_n$that of a neutron. A given nucleus, of binding energy B, contains Z protons and N neutrons. The mass M(N, Z) of the nucleus is given by (c is velocity of light )
neet
physics
past papers
2004
31
asked
Jul 24, 2018
by
pady_1
1
answer
In a Wheatstone's bridge all the four arms have equal resistance R. If the resistance of the galvanometer arm is also R, the equivalent resistance of the combination as seen by the battery is :
neet
physics
past papers
2003
31
asked
Jul 24, 2018
by
pady_1
1
answer
For a transistor $\frac{I_C}{I_E}$ = 0.96, then current gain for common emitter configuration : -
neet
physics
past papers
2002
31
asked
Jul 23, 2018
by
pady_1
1
answer
Tangent galvanometer is used to measure : -
neet
physics
past papers
2001
31
asked
Jul 20, 2018
by
pady_1
1
answer
From the following diode circuit. Which diode in forward biased condition :
neet
physics
past papers
2000
31
asked
Jul 20, 2018
by
pady_1
0
answers
A ball is dropped from a height of 5 m, if it rebound upto height of 1.8 m, then the ratio of velocities of the ball after and before rebound is :
neet
physics
past papers
1998
31
asked
Jun 15, 2018
by
pady_1
1
answer
Zoe bought 6 packages of cat food and 2 packages of dog food. Each package of cat food contained 7 tins, and each package of dog food contained 4 tins. How many more tins of cat food than dog food did Zoe buy?
class5
math
olympiad
logical
analytical
reasoning
31
asked
Dec 31, 2015
by
pady_1
1
answer
The number of lines of symmetry in a scalene triangle is
class5
math
olympiad
data handling
31
asked
Dec 31, 2015
by
pady_1
1
answer
Surjeet's aunt lives 110 kilometers away from his house. When he wants to visit his aunt, he travels \large\frac{1}{10} of this distance by train and the rest by bus. How many kilometers does he travels by bus?
class5
math
olympiad
measurements
31
asked
Dec 31, 2015
by
pady_1
0
answers
$7 \large\frac{115}{1000}$ in decimal form gives us
class5
math
olympiad
fractions
decimals
31
asked
Dec 31, 2015
by
pady_1
0
answers
A man spends 66 \large\frac{2}{3}\% of his monthly salary. If he spends $ 300 every month, find his monthly salary?
class5
math
olympiad
computation
31
asked
Dec 31, 2015
by
pady_1
0
answers
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