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Recent questions tagged q21
Questions
If $a=\large\frac{1-i \sqrt 3}{2},$ then the correct matching of List I from List II is
jeemain
eamcet
math
2007
q21
asked
Oct 24, 2013
by
meena.p
1
answer
The IUPAC name of the compound $(CH_3)_2 CH - CH = CH - CHOH -CH_3$ is
jeemain
eamcet
chemistry
2007
q21
asked
Oct 23, 2013
by
meena.p
1
answer
A gas mixture contains 50% helium and 50% methane by volume .What is the percentage by mass of methane in the mixture
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
percentage-composition
q21
medium
asked
Oct 23, 2013
by
sreemathi.v
1
answer
A whistle of frequency 540 Hz rotates in a horizontal circle of radius 2 m at an angular speed of 15 rad/s. The highest frequency heard by a listener at rest with respect to the center of circle (velocity of sound in air = $330 ms^{-1}$)
jeemain
eamcet
physics
2007
q21
asked
Oct 22, 2013
by
meena.p
1
answer
Let $f(x) =x^2$ and $g(x)=\sin x$ for all $x\in R$ .Then the set of all $x$ satisfying $(fogogof)(x)=(gogof)(x)$ where $fog(x)=f(g(x))$ is
jeemain
math
class11
ch3
trigonometric-functions
q21
trignometric-equations
difficult
asked
Oct 21, 2013
by
sreemathi.v
1
answer
The points in the set $\bigg\{z \in C: Arg \bigg(\large\frac{Z-2}{Z-6i}\bigg)-\frac{\pi}{2}\bigg\}$ lie on the curve which is (Where C denotes the set of all complex numbers )
jeemain
eamcet
math
2008
q21
asked
Oct 17, 2013
by
meena.p
1
answer
Study the following lists
jeemain
eamcet
biology
2012
q21
asked
Oct 16, 2013
by
thanvigandhi_1
1
answer
Let $f(x)=\cos x(\sin x+\sqrt{\sin^2 x+\sin^2\theta})$ where $\theta$ is a given constant then maximum value of $f(x)$ is
jeemain
math
class11
ch3
trigonometric-functions
q21
basic-trigonometric-functions
medium
asked
Oct 15, 2013
by
sreemathi.v
1
answer
If $n$ is an integer which leaves remainder one when divided by three, then $(1+\sqrt {3}i)^n+(1-\sqrt {3}i)^n=$
jeemain
eamcet
math
2009
q21
asked
Oct 9, 2013
by
meena.p
1
answer
If $A=\cos^2\theta+\sin^4\theta$ then for all value of $\theta$
jeemain
math
class11
ch3
trigonometric-functions
q21
trignometric-identities
easy
asked
Oct 7, 2013
by
sreemathi.v
1
answer
Work done in increasing the length of $1\;m$ long wire of cross-sectional area $1\;mm^2$ through $1\;mm$ is $y=2 \times 10^{11}N/m^2$
jeemain
physics
class11
unit7
properties-of-solids-and-fluids
q21
easy
asked
Oct 3, 2013
by
meena.p
1
answer
Which one of the following SCP organisms lack a membrane bound nucleus?
jeemain
eamcet
biology
2013
q21
asked
Oct 3, 2013
by
thanvigandhi_1
1
answer
$(\sqrt 3+i)^7+(\sqrt 3-i)^7=$
jeemain
eamcet
math
2010
q21
asked
Sep 26, 2013
by
meena.p
1
answer
If $a,b$ and $n$ are natural numbers then $a^{n-1}+b^{n-1}$ is divisible by:
jeemain
eamcet
math
2011
q21
asked
Sep 20, 2013
by
meena.p
1
answer
$\large\frac{(1+i)x-i}{2+i}+\frac{(1+2i)y+i}{2-i}$$=1=>(x,y)=$
jeemain
eamcet
math
2013
q21
asked
Sep 14, 2013
by
meena.p
1
answer
If $C_0,C_1,C_2,$................... are the binomial coefficient in the expansion of $(1+x)^n$, then $C_0+\large\frac{C_1}{2}$$x+\large\frac{C_2}{3}$$x^2+........+ \large\frac{C_n}{n+1}$$x^n$= ...................
jeemain
eamcet
math
1991
fitb
q21
asked
Sep 13, 2013
by
meena.p
0
answers
The number of moles of barium carbonate which contains $1.5$ moles of $O_2$ atoms is .................. .
jeemain
eamcet
chemistry
1991
fitb
q21
asked
Sep 12, 2013
by
meena.p
0
answers
If $ 4 \times 10^{20}$ eV of energy is required to move a charge of $6.25 \;C$ between two points, the PD between them is ............ volts.
jeemain
eamcet
physics
1991
fitb
q21
asked
Sep 11, 2013
by
meena.p
0
answers
The most probable product in the following reaction is
jeemain
chemistry
unit22
organic-chemistry
halogens
q21
medium
asked
Sep 3, 2013
by
sreemathi.v
1
answer
Suppose the gravitational force varies inversely as the $n^{th}$ power of distance, then the time period of planet in circular orbit of Radius 'R' around the sun will be proportional to
jeemain
physics
class11
unit6
gravitation
q21
medium
asked
Aug 11, 2013
by
meena.p
1
answer
A car of mass m is driven with acceleration 'a' along a straight level road against a constant external resistive force 'R'. when velocity of car is 'V', the rate at which the engine of car is doing work will be
jeemain
physics
class11
ch6
work-power-energy
q21
easy
power
asked
Jul 18, 2013
by
meena.p
1
answer
A body of mass 50 kg is pulled by a rope of length 8 m on a surface by a force of 108 N applied at the other end. The force that is acting on the 50 kg mass, if the linear density of rope is 0.5 kg/m will be
jeemain
physics
class11
unit3
laws-of-motion
q21
easy
asked
Jul 5, 2013
by
meena.p
1
answer
If $h$ - is plank constant,e charge then dimension of ohm is same as
jeemain
physics
class11
ch2
units-and-measurement
q21
medium
dimensional-formulae-and-analysis
asked
Jun 18, 2013
by
meena.p
1
answer
Discuss the continuity of the following functions $(c)\;f(x)=\sin x.\cos x$
cbse
class12
ch5
sec1
q21
q21-c
p160
sec-a
easy
math
asked
May 28, 2013
by
sreemathi.v
1
answer
Discuss the continuity of the following functions $(b)\;f(x)=\sin x-\cos x$
cbse
class12
ch5
sec1
q21
q21-b
p160
sec-a
easy
math
asked
May 28, 2013
by
sreemathi.v
1
answer
Discuss the continuity of the following functions $(a)\;f(x)=\sin x+\cos x$
cbse
class12
ch5
sec1
q21
q21-a
p160
sec-a
easy
math
asked
May 28, 2013
by
sreemathi.v
1
answer
The Angle between the parabolas $y^{2}=x$ and $x^{2}=y$ at the origin is
tnstate
class12
bookproblem
p231
objective
q21
sec-a
medium
asked
May 16, 2013
by
poojasapani_1
1
answer
If $\overrightarrow{a}$ and $\overrightarrow{b}$ are two unit vectors and $\theta $is the angle between them, then $(\overrightarrow{a}+\overrightarrow{b})$ is a unit vector if
tnstate
class12
bookproblem
p265
objective
q21
modelpaper
oct-2006
oct-2007
mar-2008
oct-2009
asked
May 8, 2013
by
poojasapani_1
1
answer
If $x\sin (a+y)+\sin a \cos(a+y)=0$,Prove that $\large\frac{dy}{dx}=\large\frac{\sin^2(a+y)}{\sin a}$
cbse
class12
modelpaper
2013
sec-b
q21
65-3
math
asked
Mar 22, 2013
by
sreemathi.v
1
answer
Evaluate :$\int\limits_0^{\pi}\large\frac{xsin x}{1+cos^2x}dx.$
cbse
class12
modelpaper
2013
sec-b
q21
65-2
math
asked
Mar 22, 2013
by
sreemathi.v
1
answer
Find the vector equation of the plane through the points (2,1,-1) and (-1,3,4) and perpendicular to the plane x-2y+4z=10.
cbse
class12
modelpaper
2013
sec-b
q21
q21-2
65-1
q17
q17-2
65-2
q15
q15-2
65-3
math
asked
Mar 20, 2013
by
sreemathi.v
1
answer
Show that the lines $\begin{array}{1 1}\overrightarrow{r}=3\hat{i}+2\hat{j}-4\hat{k}+\lambda(\hat{i}+2\hat{j}+2\hat{k});\\\overrightarrow{r}=5\hat{i}-2\hat{j}+\mu(3\hat{i}+2\hat{j}+6\hat{k})\end{array} $ are intersecting. Hence find their point of intersection.
cbse
class12
modelpaper
2013
sec-b
q21
q21-1
65-1
q17
q17-1
65-2
q15
q15-1
65-3
math
asked
Mar 20, 2013
by
sreemathi.v
1
answer
If \( y=3\cos(\log\: x)+4\sin(\log\: x),\) then show that $ x^2.\large\frac{d^2y}{dx^2}$$+x\large\frac{dy}{dx}$$+y=0$
cbse
class12
modelpaper
2012
sec-b
q21
easy
math
asked
Feb 15, 2013
by
thanvigandhi_1
1
answer
Find $\large \frac{dy}{dx}$ if $( (x^2+y^2)^2=xy)$
cbse
class12
modelpaper
2012
sec-b
q21
easy
math
asked
Feb 15, 2013
by
thanvigandhi_1
1
answer
Find the equation of the line passing through the point P(4,6,2) and the point of intersection of the line \( \frac{x-1}{3}=\frac{y}{2}=\frac{z+1}{7} \) and the plane \( x+y-z=8\).
cbse
class12
modelpaper
2012
sec-b
q21
math
asked
Feb 11, 2013
by
thanvigandhi_1
0
answers
Find the shortest distance between the following lines : \[ \frac{x-3}{1}=\frac{y-5}{-2}=\frac{z-7}{1} \: and \: \frac{x+1}{7}=\frac{y+1}{-6}=\frac{z+1}{1} \]
cbse
class12
modelpaper
2012
sec-b
q21
math
asked
Feb 11, 2013
by
thanvigandhi_1
0
answers
Find the point on the line \( \large\frac{x+2}{3}=\frac{y+1}{2}=\frac{z-3}{2} \) at a distance \( 3\sqrt 2\) from the point (1,2,3)
cbse
class12
modelpaper
2012
sec-b
q21
medium
math
asked
Feb 11, 2013
by
thanvigandhi_1
1
answer
Find the shortest distance between the following pairs of lines whose vector equation are $ \overrightarrow r = 3\hat i + 8\hat j + 3\hat k + \lambda(3\hat i - \hat j + \hat k)\: and \: \overrightarrow r = -3\hat i - 7\hat j + 6\hat k + \mu(-3\hat i + 2\hat j + 4\hat k) $
cbse
class12
modelpaper
2012
sec-b
q21
medium
math
asked
Feb 9, 2013
by
thanvigandhi_1
1
answer
Find the equation of the plane that contains the point (1,-1,2) and is perpendicular to each of the planes \( 2x=3y-2z=5\: and \: x+2y-3z=8.\)
cbse
class12
modelpaper
2012
sec-b
q21
math
asked
Feb 8, 2013
by
thanvigandhi_1
0
answers
In a hurdle race, a player has to cross 10 hurdles. The probability that he will clear each hurdle is \( \frac{5}{6} \), What is the probability that he will knock down fewer than 2 hurdles.
cbse
class12
modelpaper
2012
sec-b
q21
math
asked
Feb 8, 2013
by
thanvigandhi_1
1
answer
Four cards are successively drawn without replacement from a deck of 52 playing cards. What is the probability that all the four cards are kings.
cbse
class12
modelpaper
2012
sec-b
q21
medium
math
asked
Feb 7, 2013
by
thanvigandhi_1
1
answer
Bag I contains 3 black and 2 white balls. Bag II contains 2 black and 4 white balls. A bag and a ball is selected at random. Determine the probability of selecting a black ball.
cbse
class12
modelpaper
2012
sec-b
q21
medium
math
asked
Feb 7, 2013
by
thanvigandhi_1
1
answer
Solve the following differential equation : $\large\frac{dy}{dx}$$+2y\tan\: x = \sin\: x.$ given that \( y=0, \: when\: x = \large\frac{\pi}{3}. \)
cbse
class12
modelpaper
2012
sec-b
q21
medium
math
asked
Feb 6, 2013
by
thanvigandhi_1
1
answer
Find the shortest distance between the lines : $ \overrightarrow r = 6\hat i + 2 \hat j +2\hat k + \lambda(\hat i-2\hat j+2\hat k)\: and \: \overrightarrow r = -4\hat i -\hat k + \mu(3\hat i-2\hat j-2\hat k) $
cbse
class12
modelpaper
2012
sec-b
q21
medium
math
asked
Feb 6, 2013
by
thanvigandhi_1
1
answer
A pack of 52 cards were distributed equally among 4 players. Find the chance that 4 kings are held by particular player.
cbse
class12
additionalproblem
kvquestionbank2012
ch13
q21
p42
math
asked
Feb 5, 2013
by
meena.p
0
answers
Evaluate : $ \int_0^{\large\frac{\pi}{4}} \log(1+\tan x)dx $
cbse
class12
modelpaper
2012
sec-c
q21
medium
math
asked
Feb 5, 2013
by
thanvigandhi_1
1
answer
Find the distance of the point (1,-2,3) from the plane x-y+z = 5 measured parallel to the line $ \Large\frac{x+1}{2}=\frac{y+3}{2}=\frac{z+1}{-6}$
cbse
class12
additionalproblem
kvquestionbank2012
ch11
q21
p38
math
asked
Feb 5, 2013
by
meena.p
0
answers
Using vector method, prove that if the diagonals of a parallelogram are equal in length, then it is a rectangle.
cbse
class12
additionalproblem
kvquestionbank2012
ch10
q21
p36
difficult
sec-b
math
asked
Feb 5, 2013
by
meena.p
1
answer
Find the shortest distance between the following lines whose vector equations are $ \overrightarrow r = (1-t)\hat i +(t-2)\hat j + (3-2t)\hat k \: and \: \overrightarrow r = (s+1)\hat i +(2s-1)\hat j - (2s+1)\hat k .$
cbse
class12
modelpaper
2012
sec-b
q21
math
asked
Feb 5, 2013
by
thanvigandhi_1
0
answers
A population grows at the rate of 8% per year. How long does it take for the population to double?
cbse
class12
additionalproblem
kvquestionbank2012
ch9
q21
p34
sec-b
math
asked
Feb 4, 2013
by
meena.p
0
answers
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