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Recent questions tagged q47
Questions
Which of the following pairs of compounds is isoelectronic and isostructural ?
neet
2017
physics
past paper
t1
q47
asked
Nov 2, 2017
by
meena.p
0
answers
Common emitter circuit is used as amplifier, its current gain is 50. If input resistance is $1 K \Omega$ and input voltage is 5 volt then output current will be :
neet
1998
physics
past paper
t1
q47
asked
Oct 10, 2017
by
priyanka.c
0
answers
A uniform magnetic field of $3000\;G$ is established along the positive z- direction . A rectangular loop of sides $10\;cm$ and $5\;cm$carries a current of $12\;A$. What is the torque on the loop in the case as shown in the figure? What is the force in this case ?
cbse
class12
physics
ch-4
sec-b
q47
ncert
medium
asked
Jul 28, 2015
by
meena.p
1
answer
The current in the coil is reversed and the coil is rotated about its vertical axis by an angle of $90^{\circ}$ in the anti clock wise sense looking from above . Predict the direction of the needle. Take the negative declination at the places to be zero.
cbse
class12
physics
ch-5
sec-a
q47
ncert
easy
asked
Jul 15, 2015
by
meena.p
1
answer
A compass needle free to turn in a horizontal plane is placed at the center of circulaum coil of $30$ turns and radius $12\;cm$ . The coil is in a vertical plane making an angle of $45^{\circ}$ with the magnetic medician. when the current in the coil is $0.35\;A$ the needle points west to East. Determine the horizontal component of the earth's magnetic field at the location .
cbse
class12
physics
ch-5
sec-a
q47
ncert
medium
asked
Jul 15, 2015
by
meena.p
1
answer
Five equal resistor of each $R \Omega$ are connected as shown in the figures. calculate the equivalent resistance between A and B
cbse
class12
physics
ch-3
sec-a
q47
easy
asked
Jul 6, 2015
by
meena.p
1
answer
A is a metallic sphere placed between two charged metallic plates. A student draws the line of force as shown in the figure . Is he correct ?
cbse
class12
physics
ch-1
sec-a
q47
difficult
asked
Apr 24, 2015
by
meena.p
1
answer
The area of the circle centred at $(1,2)$ and passing through $(4,6)$ is
cbse
class11
math
conic-sections
circle
exemplar
sec-a
easy
q47
asked
Oct 16, 2014
by
sreemathi.v
1
answer
A 0.1539 molal aqueous solution of cane sugar (mol mass =$342gmol^{-1}$) has a freezing point of 271K while the freezing point of pure water is $273.15K$.What will be the freezing point of an aqueous solution containing 5g of glucose (mol mass =$180gmol^{-1}$) per 100g of solution.
cbse
class12
chemistry
ch2
solutions
sec-b
medium
additionalproblem
q47
asked
Aug 8, 2014
by
sreemathi.v
1
answer
Which of the following alloys does not contain aluminium ?
jeemain
chemistry
inorganic-chemistry
class11
ch11
p-block-elements
group-13
boron-family
easy
q47
asked
Jul 26, 2014
by
thanvigandhi_1
1
answer
The mean and standard deviation of a set of $n_1$ observations are $\bar{x_1}$ and $s_1$ respectively , while the mean and standard deviation of another set of $n_2$ observations are $x_2$ and $s_2$ respectively. Show that the standard deviation of the combined set of $(n_1+n_2)$ observations is given by $ S.D= \sqrt {\large\frac{n_1 (s_1)^2 +n_2 (s_2)^2}{n_1+n_2} +\frac{n_1n_2(\bar {x_1} -\bar {x_2} )^2}{(n_1+n_2)^2}}$
cbse
math
class11
ch15
statistics
exemplar
q47
sec-c
difficult
asked
Jul 9, 2014
by
meena.p
1
answer
The number of ways in which one can select three distinct integers between 1 and 30 both inclusive ,whose sum is even is
cbse
math
class11
ch7
permutations-and-combinations
additionalproblem
q47
sec-c
difficult
asked
Jun 20, 2014
by
sreemathi.v
1
answer
In a foot ball championship,$153$ matches were played. Every two teams played one match with each other. The number of teams,participating in the championship is
cbse
math
class11
ch7
permutations-and-combinations
exercise7-3
exemplar
q47
sec-b
medium
asked
May 16, 2014
by
sreemathi.v
1
answer
$\tan A=\large\frac{1}{2}$$,\tan B=\large\frac{1}{3}$,then $\tan (2A+B)$ is equal to
cbse
math
class11
ch3
trigonometric-functions
exemplar
q47
sec-c
difficult
asked
Apr 21, 2014
by
sreemathi.v
1
answer
If $f$ and $g$ are differentiable function in $[0, 1]$ satisfying $f(0)=2 = g(1),g(0)= 0$ and $f(1)=6 $, then for some $c\in [0,1]$
jeemain
jeemain-2014
math
q47
medium
asked
Apr 7, 2014
by
sreemathi.v
1
answer
ATP represents
jeemain
aipmt
chemistry
biomolecules
organic-chemistry
cbse
class12
unit16
medium
q47
asked
Mar 28, 2014
by
thanvigandhi_1
1
answer
p-chloro aniline and anilinium hydrochoride can be distinguished by
jeemain
aipmt
chemistry
nitrogen
organic-chemistry
cbse
class12
unit13
q47
difficult
asked
Mar 26, 2014
by
thanvigandhi_1
1
answer
The polymerization of ethylene to linear polyethylene is represented by the reaction \[\] $nCH_2=CH_2 \rightarrow (CH_2-CH_2)_n$ \[\] where $n$ has a large integral value. Given that $ \Delta H_{C=C}$ and $ \Delta H_{C-C}$ at 298 K are 590 and 331 kJ/mol. Calculate the enthalpy of polymerization per mol of ethylene.
jeemain
physics
thermodynamics
cbse
class11
class12
q47
medium
asked
Mar 17, 2014
by
thanvigandhi_1
1
answer
The Oxide of a metal (R) can be reduced by the metal (p) while metal (R) can reduce the oxide of metal (Q) Here the decreasing order of the reactivity of metal (P) and (Q) and (R) with oxygen
jeemain
cbse
chemistry
class12
unit6
general-principals-and-processes-of-isolation-of-metals
q47
difficult
asked
Mar 17, 2014
by
meena.p
1
answer
Acrilon is a hard and low melting material which of the following represents its true structure?
jeemain
aipmt
chemistry
cbse
unit5
class12
organic-chemistry-polymers
q47
medium
asked
Mar 10, 2014
by
thanvigandhi_1
1
answer
The incorrect combination among the following is
jeemain
chemistry
physical-chemistry
class11
unit4
chemical-bonding-and-molecular-structure
vsepr(valence-shell-electron-pair-repulsion)theory
q47
medium
asked
Mar 6, 2014
by
sreemathi.v
1
answer
The number of nodal planes in a $'p_y'$ orbital is
jeemain
chemistry
physical-chemistry
class11
unit4
chemical-bonding-and-molecular-structure
molecular-orbital-theory
q47
easy
asked
Mar 5, 2014
by
sreemathi.v
1
answer
Arrange the compounds shown below in order of decreasing basicity (most basic first)
jeemain
chemistry
unit13
class12
organic-chemistry
nitrogen
amines
q47
difficult
asked
Mar 3, 2014
by
sreemathi.v
1
answer
The number of isomers for the compound with molecular $C_2BrClFI$ is :
jeemain
chemistry
class11
organic-chemistry
q47
medium
basic-organic-chemistry
ch12
asked
Feb 24, 2014
by
meena.p
1
answer
What is the major organic product obtained from the following reaction?
jeemain
chemistry
unit11
unit12
class12
organic-chemistry
oxygen
aldehyde-and-ketones
q47
medium
asked
Feb 21, 2014
by
sreemathi.v
1
answer
Sulphur Vapour($S_n$) diffuses through a process plug at 0.354 rate of diffusion of $O_2$ gas under similar conditions of P and T. Find the volume of n.
jeemain
chemistry
physical-chemistry
class11
unit5
states-of-matter
ideal-gas-equation
easy
q47
asked
Feb 17, 2014
by
sharmaaparna1
1
answer
Find the equation of tangent at $(x_1,y_1)$ for the parabola $y^2=4ax$?
jeemain
math
class11
coordinate-geometry-conic-sections
parabola
ch11
q47
easy
asked
Feb 5, 2014
by
sreemathi.v
1
answer
The graph of the function $y=f(x)$ passing through the point $(0,1)$ and satisfy the differential equation $\large\frac{dy}{dx}$$+y \cos x =\cos x $ is such that
jeemain
math
class12
ch9
differential-equations
solving-using-separation-of-variables
q47
difficult
asked
Feb 5, 2014
by
meena.p
1
answer
$[Cr(H_2O)_5Cl]SO_4$ and $[Cr(H_2O)_5SO_4]Cl$ are
jeemain
chemistry
class12
coordination-compounds
unit9
q47
medium
asked
Feb 3, 2014
by
sreemathi.v
1
answer
In a college of 300 students every student reads 5 newspapers and every newspaper is read by 60 students. The number of newspaper is
jeemain
math
cbse
class11
statistics
difficult
analysis-of-frequency-distributions
q47
asked
Feb 1, 2014
by
thanvigandhi_1
1
answer
The correlation coefficient of two variables $x$ and $y$ is 0.8. The regression coefficient of $y$ on $x$ is 0.2 then the regression coefficient of $x$ and $y$ is
jeemain
math
cbse
class11
statistics
correlation-coefficient
medium
q47
asked
Jan 29, 2014
by
thanvigandhi_1
1
answer
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