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Recent questions tagged 49
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Questions from:
A hole is :
jeemain
physics
past papers
1998
49
asked
Dec 19, 2018
by
pady_1
0
answers
The element that can be used as acceptor impurity to dope silicon is :
jeemain
physics
past papers
1999
49
asked
Dec 19, 2018
by
pady_1
0
answers
A source producing sound of frequency $170 \; Hz$ is approaching a stationary observer with a velocity of $17\;ms^{-1}$. The apparent change in the wavelength of sound heard by the observer is : (speed of sound in air = $340\; ms^{-1}$)
jeemain
physics
past papers
2000
49
asked
Dec 19, 2018
by
pady_1
0
answers
A tank with vertical walls is mounted so that its base is at a height $H$ above the horizontal ground. The tank is filled with wate to a depth $'h'$. A hole is punched in the side wall of the tank at a depth $'x'$ below the water surface. To have maximum range of the emerging stream, the value of $x$ is :
jeemain
physics
past papers
2001
49
asked
Dec 11, 2018
by
pady_1
0
answers
A cylinder of height 20 m is completely filled with water. The velocity of efflux of water (in $ms^{-1}$) through a small hole on the side wall of the cylinder near its bottom, is :
jeemain
physics
past papers
2002
49
asked
Dec 11, 2018
by
pady_1
0
answers
A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor :
jeemain
physics
past papers
2003
49
asked
Dec 11, 2018
by
pady_1
0
answers
Let $g(x) = \cos x^2, \; f(x) = \sqrt{x}$ and $\alpha, \;\beta \;(\alpha < \beta)$ be the roots of the quadratic equation $18x^2-9 \pi x + x^2 = 0$. Then the area (in sq. units) bounded by the curve $y=(gof)(x) $ and the lines $x = \alpha,\; x = \beta$ and $y =0$, is
jeemain
math
past papers
2018
49
asked
Dec 11, 2018
by
pady_1
0
answers
A capacitance of $2 \mu F$ is required in an electrical circuit across a potential difference of $1.0\; kV$. A large number of $1 \mu F$ capacitors are available which can withstand a potential difference of not more than $300\; V$. The minimum number of capacitors required to achieve this is :
jeemain
physics
past papers
2017
49
asked
Dec 11, 2018
by
pady_1
0
answers
Which one of the following complexes shows optical isomerism ? <br> (en=ethylenediamine)
jeemain
chemistry
past papers
2016
49
asked
Dec 11, 2018
by
pady_1
0
answers
The correct statement on the isomerism associated with the following complex ions, <br> (a) $[Ni(H_2O)_5NH_3]^{2+},$<br>(b)$[ Ni(H_2O)_4 (NH_3)_2]^{2+} $ and <br> (c)$[Ni(H_2O)_3 (NH_3)_3]^{2+} $ is :
jeemain
chemistry
past papers
2015
49
asked
Dec 11, 2018
by
pady_1
0
answers
Let C be the circle with centre at $(1, 1)$ and $radius = 1$. If T is the circle centred at $(0, y)$, passing through origin and touching the circle C externally, then the radius of T is equal to
jeemain
math
past papers
2014
49
asked
Dec 11, 2018
by
pady_1
0
answers
Statement -I : The value of the integral $\begin{align*} \int_{\pi/6}^{\pi/3} \frac{dx}{1+\sqrt{\tan x} } \end{align*}$ is equal to $\frac{\pi}{6}$. <br> Statement-II : $\begin{align*} \int_a^b f(x) dx = \int_a^b f(a+b-x) dx \end{align*}$
jeemain
math
past papers
2013
49
asked
Dec 11, 2018
by
pady_1
0
answers
Truth table for system of four NAND gates as shown in figure is <br> <img src="http://clay6.com/mpaimg/987_a.jpg"/>
jeemain
physics
past papers
2012
49
asked
Dec 11, 2018
by
pady_1
0
answers
The two circles $x^2+y^2=ax$ and $x^2+y^2 =c^2 (c>0)$ touch each other if
jeemain
math
past papers
2011
49
asked
Dec 11, 2018
by
pady_1
0
answers
Let there be a spherically symmetric charge distribution with charge density varying as $\rho(r) = \rho_{_0}(\frac{5}{4} - \frac{r}{R})$ upto $r = R$ and $\rho (r) = 0$ for $r > R$, where $r$ is the distance from the origin. The electric field at a distance $r (r < R) $ from the origin is given by
jeemain
physics
past papers
2010
49
asked
Dec 11, 2018
by
pady_1
0
answers
Using MO theory predict which of the following species has the shortest bond length ?
jeemain
chemistry
past papers
2009
49
asked
Nov 29, 2018
by
pady_1
0
answers
Bakelite is obtained from phenol by reacting with
jeemain
chemistry
past papers
2008
49
asked
Nov 29, 2018
by
pady_1
0
answers
In gamma ray emission from a nucleus:
jeemain
physics
past papers
2007
49
asked
Nov 29, 2018
by
pady_1
0
answers
An inductor $(L=100 mH)$, a resistor $(R = 100 \Omega )$ and a battery $(E = 100 V)$ are initially connected in series as shown in the figure. After a long time the battery is disconnected after short circuiting the points A and B. The current in the circuit 1 ms after the short circuit is : <br> <img src="http://clay6.com/mpaimg/1116_a.jpg"/>
jeemain
physics
past papers
2006
49
asked
Nov 13, 2018
by
pady_1
0
answers
If the circles $x^2 + y^2 + 2ax + cy + a = 0 $ and $x^2 + y^2-3ax + dy - 1 = 0$ intersect in two distinct points $P$ and $Q$, then the line $5x+by-a = 0$ passes through $P$ and $Q$ for :
jeemain
math
past papers
2005
49
asked
Nov 5, 2018
by
pady_1
0
answers
In the circuit, the galvanometer $G$ shows zero deflection. If the batteries $A$ and $B$ have negligible internal resistance, the value of the resistor $R$ will be: <br> <img src="http://clay6.com/mpaimg/906_a.jpg "/>
jeemain
physics
past papers
2005
49
asked
Nov 5, 2018
by
pady_1
0
answers
If a circle passes through the point (a, b) and cuts the circle $x^2+y^2=4$ orthogonally, then the locus of its centre is
jeemain
math
past papers
2004
49
asked
Nov 5, 2018
by
pady_1
0
answers
Regarding cross-linked or network polymers, which of the following statements is incorrect ?
neet
chemistry
past papers
2018
49
asked
Aug 21, 2018
by
pady_1
0
answers
Fruit and leaf drop at early stages can be prevented by the application of
neet
botany
past papers
2017
49
asked
Aug 21, 2018
by
pady_1
0
answers
Which is the National Aquatic Animal of India ?
neet
botany
past papers
2016
49
asked
Aug 21, 2018
by
pady_1
0
answers
Which one of the following animals has two separate circulatory pathways ?
neet
zoology
past papers
2015
49
asked
Aug 21, 2018
by
pady_1
0
answers
If a the length of the side of a cube, the distance between the body centered atom one corner atom in the cube will be -
neet
chemistry
past papers
2014
49
asked
Aug 20, 2018
by
pady_1
0
answers
A hydrogen gas electrode is made by dipping platinum wire in a solution of HCl of pH = 10 and by passing hydrogen gas around the platinum wire at one atm pressure. The oxidation potential of electrode would be ?
neet
chemistry
past papers
2013
49
asked
Aug 20, 2018
by
pady_1
0
answers
C and Si both have same lattice structure, having 4 bonding electrons in each. However, C is insulator where as Si is intrinsic semiconductor. This is because.
neet
physics
past papers
2012
49
asked
Aug 20, 2018
by
pady_1
0
answers
In forward biasing of the p-n junction :
neet
physics
past papers
2011
49
asked
Aug 16, 2018
by
pady_1
0
answers
Consider the following two statements – (A) Kirchhoff's junction law follows from the conservation of charge (B) Kirchhoff's loop law follows from the conservation of energy Which of the following is correct ?
neet
physics
past papers
2010
49
asked
Jul 26, 2018
by
pady_1
0
answers
The symbolic representation of four logic gates are given below :<br> <img src="http://clay6.com/mpaimg/207_a.jpg"/> <br> The logic symbols for OR, NOT and NAND gates are respectively :
neet
physics
past papers
2009
49
asked
Jul 26, 2018
by
pady_1
0
answers
The ratio of the radii of gyration of a circular disc to that of a circular ring, each of same mass and radius around their respective axes is -
neet
physics
past papers
2008
49
asked
Jul 26, 2018
by
pady_1
0
answers
In the following circuit, the output Y for all possible inputs A and B is expresed by the truth table :- <img src="http://clay6.com/mpaimg/or-nor.jpg"/>
neet
physics
past papers
2007
49
asked
Jul 26, 2018
by
pady_1
0
answers
The vectors $\overrightarrow{A}$ and $\overrightarrow{B}$ are such that $[\overrightarrow{A}+\overrightarrow{B}]=[\overrightarrow{A}-\overrightarrow{B}]$ .The angle between the two vectors is:-
neet
physics
past papers
2006
49
asked
Jul 25, 2018
by
pady_1
0
answers
Two bodies have their moments of inertia I and 2I respectively about their axis of rotation. If their kinetic energies of rotation are equal, their angular momentum will be in the ratio -
neet
physics
past papers
2005
49
asked
Jul 24, 2018
by
pady_1
0
answers
A galvanometer of 50 ohm resistance has 25 divisions. A current of $4\times 10^{-4}$ ampere gives a deflection of one division. To convert this galvanometer into a voltmeter having a range of 25 volts, it should be connected with a resistance of
neet
physics
past papers
2004
49
asked
Jul 24, 2018
by
pady_1
0
answers
A nuclear reaction given by $_ZX^A \to _{Z + 1}Y^A + _{–1}e ^0 + \overline{v}$ represents
neet
physics
past papers
2003
49
asked
Jul 24, 2018
by
pady_1
0
answers
A sample of radioactive element containing $4 \times10^{16}$ active nuclei. Half life of element is 10 days, then number of decayed nuclei after 30 days : -
neet
physics
past papers
2002
49
asked
Jul 23, 2018
by
pady_1
1
answer
A 1 kg stationary bomb is exploded in three parts having mass 1 : 1 : 3 respectively. Parts having same mass move in perpendicular direction with velocity 30 $ms^{–1}$, then the velocity of bigger part will be
neet
physics
past papers
2001
49
asked
Jul 20, 2018
by
pady_1
0
answers
A bubble in glass slab $(\mu = 1.5)$ when viewed from one side appears at 5 cm and 2 cm from other side, then thickness of slab is :
neet
physics
past papers
2000
49
asked
Jul 20, 2018
by
pady_1
0
answers
A point Q lies on the perpendicular bisector of an electrical dipole of dipole moment p. If the distance of Q from the dipole is r (much larger than the size of the dipole), then the electric field at Q is proportional to :
neet
physics
past papers
1998
49
asked
Jun 15, 2018
by
pady_1
0
answers
Which of the following is different from others ?
class5
math
olympiad
logical
analytical
reasoning
49
asked
Dec 31, 2015
by
pady_1
0
answers
Of the students in Denelle's class, 5 like to drink soda. 5 students like to drink orange juice. 2 students like to drink both soda and orange juice. How many students like to drink soda or orange juice or both?
class5
math
olympiad
data handling
49
asked
Dec 31, 2015
by
pady_1
0
answers
A brick measures 15 cm in length, 8 cm in breadth and 5 cm in height. How many bricks will be used to make a wall of length 15 m, breadth 10 m and height 8 metres?
class5
math
olympiad
measurements
49
asked
Dec 31, 2015
by
pady_1
0
answers
${18 + (2 \large\frac{1}{2} + \large\frac{4}{5})}$ of $\large\frac{1}{1000}$
class5
math
olympiad
fractions
decimals
49
asked
Dec 31, 2015
by
pady_1
0
answers
The height of a rectangle is less than 10. If the width of the rectangle is increased by 2 and its height is decreased by 1, then its area is increased by 4.What can you say about the width of the original rectangle?
class5
math
olympiad
computation
49
asked
Dec 31, 2015
by
pady_1
0
answers
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