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Questions from: JEEMAIN and NEET
The maximum growth rate occurs in :-
neet
botany
past papers
2004
126
answered
7 hours
ago
by
tutubasumatary11
1
answer
Plants deficient of element zinc, show its effect on the biosynthesis of plant growth hormone-
neet
botany
past papers
2003
168
answered
22 hours
ago
by
mdadnanhpatel2001
1
answer
Out of 64 codons, 61 codons code for 20 types of amino acid it is called : -
neet
botany
past papers
2002
188
answered
1 day
ago
by
singhishvet
1
answer
Suppose the gravitational force varies inversely as the $n^{th}$ power of distance. Then the time period planet in circular orbit of radius $R$ around the sun will be proportional to
jeemain
physics
past papers
2004
171
answered
Nov 16
by
alisawkat1999
1
answer
Three closed vessels A , B and C are at the same temperature T and contain gases which obey maxwellian distibution of velocities . Vessel A contains only $\;O_{2}\;$ . B only $\;N_{2}\;$ and C a mixture of equal quantities of $\;O_{2}\;$ and $\;N_{2}\;$ . If the average speed of $\;O_{2}\;$ molecules in vessel A is $\;V_{1}\;$ , that of $\;N_{2}\;$ molecules in vessel B is $\;V_{2}\;$ the average speed of the $\;O_{2}\;$ molecules in vessel C will be
jeemain
physics
class11
speed-of-molecules
kinetic-theory-of-gases
easy
kinetic-theory-of-an-ideal-gas
ch13
answered
Nov 16
by
kajalrahangdale357
2
answers
The current voltage relation of diode is given by $\;(I=e^{\large\frac{1000V}{T}-1})mA\;$ , where the applied voltage V is in volts and the temperature T is in degree kelvin .If a student makes an error measuring $\;\pm0.001 V\;$ while measuring the current of 5 mA at 300 K , what will be the error in the value of current in mA ?
jeemain
physics
2014
set-e
answered
Nov 16
by
abhijitbarde1002
1
answer
A block rests on a rough inclined plane making an angle of $30^{\circ} $ with the horizontal. The coefficient of static friction between the block and the plane is $0.8$. If the frictional force on the block is $10\; N$, the mass of the mass of the block (in kg) is (take $g=10\;m/s^2$)
jeemain
physics
past papers
2004
161
answered
Nov 15
by
dubeyanish79
1
answer
During its life-cycle, Fasciola hepatica (liver fluke) infects its intermediate host and primary host at the following larval stage respectively :
neet
zoology
past papers
2003
132
answered
Nov 14
by
darakshaneqbal
1
answer
Which one of the following is the correct percentage of the two (out of the total of 4) greenhouse gases that contribute to the total global warming ?
neet
botany
past papers
2008
111
answered
Nov 13
by
meenakshiyadav297
1
answer
If $0 < x < \pi$ and $\cos x + \sin x = \frac{1}{2}$, then $\tan x$ is:
jeemain
math
past papers
2006
150
asked
Nov 13
by
pady_1
0
answers
If $z^2 + z + 1 = 0$, where $z$ is complex number, then the value of $(z + \frac{1}{z})^2 + (z^2 + \frac{1}{z^2})^2 + (z^3 + \frac{1}{z^3})^2 + ...+ (z^6 + \frac{1}{z^6})^2$ is :
jeemain
math
past papers
2006
149
asked
Nov 13
by
pady_1
0
answers
If $a_1, a_2, ...., a_n$ are in HP, then the expression $a_1a_2 + a_2a_3 + .... + a_{n-1}a_n$ is equal to :
jeemain
math
past papers
2006
148
asked
Nov 13
by
pady_1
0
answers
Let C be the circle with centre $(0, 0)$ and radius $3$ units. The equation of the locus of the mid points of the chords of the circle $C$ that subtend an angle of $ \frac{2\pi}{3}$ at its centre, is :
jeemain
math
past papers
2006
147
asked
Nov 13
by
pady_1
0
answers
The value of $\begin{align*} \int_1^a [x] \; f'(x) \;dx, \; a > 1 \end{align*}$, where $[x]$ denotes the greatest integer not exceeding $x$, is :
jeemain
math
past papers
2006
146
asked
Nov 13
by
pady_1
0
answers
The differential equation whose solution is $Ax^2 + By^2 = 1$, where $A$ and $B$ are arbitrary constant, is of :
jeemain
math
past papers
2006
145
asked
Nov 13
by
pady_1
0
answers
The image of the point $(-1, 3, 4)$ in the plane $x - 2y = 0$ is :
jeemain
math
past papers
2006
144
asked
Nov 13
by
pady_1
0
answers
If the lines $3x - 4y - 7=0$ and $2x- 3y-5=0$ are two diameters of a circle of area $49\; \pi\; square$ units, the equation of the circle is :
jeemain
math
past papers
2006
143
asked
Nov 13
by
pady_1
0
answers
If $x^m y^n = (x+y)^{m+n}$, then $\frac{dy}{dx}$ is :
jeemain
math
past papers
2006
142
asked
Nov 13
by
pady_1
0
answers
If $(a, a^2)$ falls inside the angle made by the lines $y=\frac{x}{2}, \;x > 0$ and $y = 3x,\; x > 0$, then $a$ belongs to :
jeemain
math
past papers
2006
141
asked
Nov 13
by
pady_1
0
answers
A triangular park is enclosed on two sides by a fence and on the third side by a straight river bank. The two sides having fence are of same length $x$. The maximum area enclosed by the park is :
jeemain
math
past papers
2006
140
asked
Nov 13
by
pady_1
0
answers
If $x$ is real, the maximum value of $\frac{3x^2+9x+17}{3x^2+9x+7}$ is :
jeemain
math
past papers
2006
139
asked
Nov 13
by
pady_1
0
answers
Angle between the tangents to the curve $y=x^2-5x+6$ at the points $(2,0)$ and $(3,0)$ is :
jeemain
math
past papers
2006
138
asked
Nov 13
by
pady_1
0
answers
The function $f(x) = \frac{x}{2} +\frac{2}{x}$ has a local minimum at :
jeemain
math
past papers
2006
137
asked
Nov 13
by
pady_1
0
answers
Let $a_1, a_2, a_3, ....$ cannot be terms of an AP. If $\frac{a_1+a_2+....+a_p}{a_1 + a_2 + ....+ a_q} = \frac{p^2}{q^2}, \; p \neq q$, then $\frac{a_6}{a_{21}}$ equals :
jeemain
math
past papers
2006
136
asked
Nov 13
by
pady_1
0
answers
Let $A = \begin{bmatrix} 1 & 2 \\ 3 & 4 \end{bmatrix}$ and $B = \begin{bmatrix} a & 0 \\ 0 & b \end{bmatrix}$, $a, \; b,\; \in N$. Then :
jeemain
math
past papers
2006
135
asked
Nov 13
by
pady_1
0
answers
The set of points, where $f(x) = \frac{x}{1 +|x|} $ is differentiable, is :
jeemain
math
past papers
2006
134
asked
Nov 13
by
pady_1
0
answers
A body falling from rest under gravity passes a certain point P. It was at a distance of 400 m from P, 4 seconds prior to passing through P. If $g = 10\; m/s^2$, then the height above the point P from where the body began to fall is :
jeemain
math
past papers
2006
133
asked
Nov 13
by
pady_1
0
answers
At a telephone enquiry system the number of phone calls regarding relevant enquiry follow Poisson distribution with an average of 5 phone calls during 10 minute time intervals. The probability that there is at the most one phone call during a 10 minute time period, is :
jeemain
math
past papers
2006
132
asked
Nov 13
by
pady_1
0
answers
A particle has two velocities of equal magnitude inclined to each other at an angle $\theta$. If one of them is halved, the angle between the other and the original resultant velocity is bisected by the new resultant. The $\theta$ is :
jeemain
math
past papers
2006
131
asked
Nov 13
by
pady_1
0
answers
For natural numbers $m$, $n$ if $(1-y)^m (1+y)^n = 1 + a_{_1}y + a_{_2} y^2 + ...$ and $a_{_1} = a_{_2} = 10$, then $(m, n)$ is :
jeemain
math
past papers
2006
130
asked
Nov 13
by
pady_1
0
answers
If the expansion in power of $x$ of the function $\frac{1}{ (1-ax) (1-bx)}$ <br> $a_{_0} + a_1x + a_2x^2 + a_3x^3 + ....,$ then $a_n$ is :
jeemain
math
past papers
2006
129
asked
Nov 13
by
pady_1
0
answers
At an election, a voter may vote for any number of candidates not greater than the number to be elected. There are 10 candidates and 4 are to be elected. If a voter votes for at least one candidate, then the number of ways in which he can vote, is :
jeemain
math
past papers
2006
128
asked
Nov 13
by
pady_1
0
answers
The two lines $x=ay + b, \; z = cy + d$ and $x = a' y + b', \; z = c'y + d'$ are perpendicular to each other, if :
jeemain
math
past papers
2006
127
asked
Nov 13
by
pady_1
0
answers
$\begin{align*} \int_0^{\pi}$ x f (\sin x ) dx \end{align*}$ is equal to :
jeemain
math
past papers
2006
126
asked
Nov 13
by
pady_1
0
answers
The value of $a$, for which the points A, B, C with position vectors $2 \hat{i} - \hat{j} + \hat{k}, \; \hat{i} - 3 \hat{j} - 5 \hat{k}$ and $a \hat {i} - 3 \hat {j} - \hat{k}$ respectively are the vertices of a right angled triangle with $C = \frac{\pi}{2}$ are :
jeemain
math
past papers
2006
125
asked
Nov 13
by
pady_1
0
answers
A straight line through the point $A (3, 4)$ is such that its intercept between the axes is bisected at $A$. Its equation is :
jeemain
math
past papers
2006
124
asked
Nov 13
by
pady_1
0
answers
The locus of the vertices of the family of parabolas $y = \frac{a^3 x^2}{3} + \frac{a^2x}{2} - 2a $ is :
jeemain
math
past papers
2006
123
asked
Nov 13
by
pady_1
0
answers
In an ellipse, the distances between its foci is 6 and minor axis is 8. Then its eccentricity is :
jeemain
math
past papers
2006
122
asked
Nov 13
by
pady_1
0
answers
$\begin{align*} \int^{-\pi/2}_{-3\pi/2} [(x+\pi)^3 + \cos^2 (x+3\pi)] dx \end{align*}$ is equal to :
jeemain
math
past papers
2006
121
asked
Nov 13
by
pady_1
0
answers
Suppose a population a has 100 observations 101, 102, ..., 200 and another population $B$ has 100 observations 151, 152, ...., 250. If $V_A$ and $V_B$ represent the variances of the two population respectively, then $\frac{V_A}{V_B}$ is :
jeemain
math
past papers
2006
120
asked
Nov 13
by
pady_1
0
answers
ABC is triangle, right angled at A. The resultant of the force acting along $\overrightarrow{AB}, \overrightarrow{AC}$ with magnitudes $\frac{1}{AB}$ and $\frac{1}{AC}$ respectively is the force along $\overrightarrow{AD}$, where $D$ is the foot of the perpendicular from $A$ onto $BC$. The magnitude of the resultant is :
jeemain
math
past papers
2006
119
asked
Nov 13
by
pady_1
0
answers
All the values of m for which both roots of the equation $x^2 - 2mx + m^2 -1 = 0$ are greater than $-2$ but less than 4 lie in the interval :
jeemain
math
past papers
2006
118
asked
Nov 13
by
pady_1
0
answers
Any three vectors such that $\overrightarrow{a}. \overrightarrow{b} \neq 0,\;\overrightarrow{b}. \overrightarrow{c} \neq 0$, then $\overrightarrow{a}$ and $\overrightarrow{c}$ are :
jeemain
math
past papers
2006
117
asked
Nov 13
by
pady_1
0
answers
The value of $ \displaystyle\sum_{k=1}^{10} (\sin \frac{2k \pi}{11} + i \cos \frac{2k \pi}{11})$ is :
jeemain
math
past papers
2006
116
asked
Nov 13
by
pady_1
0
answers
If A and B are square matrices of size $n \times n$ such that $A^2 - B^2 = (A-B) (A+B)$, then which of the following will be always true ?
jeemain
math
past papers
2006
115
asked
Nov 13
by
pady_1
0
answers
The number of values of $x$ in the interval $[0, 3 \pi]$ satisfying the equation $2 \sin^2x + 5 \sin x - 3 = 0 $ is :
jeemain
math
past papers
2006
114
asked
Nov 13
by
pady_1
0
answers
Let $W$ denote the words in the English dictionary. Define the relation R by : <br> $R = \{(x,y) \in W \times W| $ the words $x$ and $y$ have at least one letter in common $\}$. Then $R$ is :
jeemain
math
past papers
2006
113
asked
Nov 13
by
pady_1
0
answers
The value of the integral $\begin{align*} \int_3^6 \frac{\sqrt{x}}{\sqrt{9 - x } + \sqrt{x}} dx \end{align*}$
jeemain
math
past papers
2006
112
asked
Nov 13
by
pady_1
0
answers
If the roots of the quadratic equation $x^2 + px + q = 0$ are tan $\tan 30^{\circ}$ and $\tan 15^{\circ}$ respectively, then the value of $2 + q - p$ is :
jeemain
math
past papers
2006
111
asked
Nov 13
by
pady_1
0
answers
$(\Delta H - \Delta H)$ for the formation of carbon monoxide (CO) from its elements at 298 K is : <br> $(R = 8.314 \; JK^{-1} mol^{-1})$
jeemain
chemistry
past papers
2006
110
asked
Nov 13
by
pady_1
0
answers
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