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Recent questions tagged q39
Questions
Two discs of same moment of inertia rotating about their regular axis passing through centre and perpendicular to the plane of disc with angular velocities $\omega_1$ and $\omega_2$. They are brought into contacl face to face coinciding the axis of rotation. The expression for loss of energy during this process is
neet
2017
physics
past paper
t1
q39
asked
Oct 31, 2017
by
meena.p
0
answers
In the Bohr model of H-atom, an electron (e) is revolving around a proton (p) with velocity v, if r is the radius of orbit and m is mass and $\varepsilon_0$ is vacuum permittivity, the value of v is :
neet
1998
physics
past paper
t1
q39
asked
Oct 10, 2017
by
priyanka.c
1
answer
The wires which connected the battery of an automobile to its starting motor carrying a current of $300\;A$ (for a short time ). What is the force per unit length between the wires , if they are $70\;cm$long and $1.5 \;cm$ apart? Is the force attractive or repulsive ?
cbse
class12
physics
ch-4
sec-b
q39
ncert
difficult
asked
Jul 28, 2015
by
meena.p
1
answer
Explain quantitative on the basis of domain picture the reversibility of a ferromagnet?
cbse
class12
physics
ch-5
sec-a
q39
ncert
easy
asked
Jul 14, 2015
by
meena.p
1
answer
Why is the potential preferred over voltmeter for measuring e.m.f ?
cbse
class12
physics
ch-3
sec-a
q39
medium
asked
Jun 30, 2015
by
meena.p
1
answer
A metallic sphere is placed in a uniform electric field as shown in the figure. which path is folllowed by electric field lines? why ?
cbse
class12
physics
ch-1
sec-a
q39
medium
asked
Apr 24, 2015
by
meena.p
2
answers
State whether the following statement is True or False : The line $2x+3y=12$ touches the ellipse $\large\frac{x^2}{9}+\frac{y^2}{4}$$=2$ at the point $(3,2)$
cbse
class11
math
conic-sections
ellipse
exemplar
sec-a
medium
q39
asked
Oct 15, 2014
by
sreemathi.v
1
answer
Urea forms an ideal solution in water .Determine the vapour pressure of aqueous solution containing 10% by mass of urea of $40^{\large\circ}C$.(Vapour pressure of water,at $40^{\large\circ}C$=55.3 mm Hg)
cbse
class12
chemistry
ch2
solutions
sec-b
easy
additionalproblem
q39
asked
Aug 8, 2014
by
sreemathi.v
1
answer
A metallic element has a cubic lattice .Each edge of the unit cell is $2A^{\large\circ}$.The density of the metal is $2.5gcm^{-3}$.The unit cells in 200g of the metal are ?
cbse
class12
chemistry
ch1
states-of-matter
solid-state
sec-b
medium
additionalproblem
q39
asked
Aug 4, 2014
by
sreemathi.v
1
answer
The reaction of concentrated $\text{HNO}_3$ with $\text{Cu}$ or $\text{Ag}$ liberates
jeemain
chemistry
inorganic-chemistry
class12
ch8
d-and-f-block-elements
important-compounds
medium
q39
asked
Jul 31, 2014
by
thanvigandhi_1
1
answer
Let S={1,2,3,4,5,6} and E={1,3,5},then $\bar{E}$ is_________.
cbse
math
class11
ch16
probability
exemplar
q39
sec-a
easy
asked
Jul 9, 2014
by
sreemathi.v
1
answer
The standard deviation of some temperature data in $^{\circ} C$ is 5. If the data were converted into $^{\circ} F$ the variance would be
cbse
math
class11
ch15
statistics
exemplar
q39
sec-b
medium
asked
Jul 9, 2014
by
meena.p
1
answer
Choose the correct answer from the given four options. A line passes through (2, 2) and is perpendicular to the line $3x + y=3$. Its y - intercept is
cbse
math
class11
ch10
straight-lines
exemplar
objective-type-question
sec-a
medium
q39
asked
Jul 6, 2014
by
thanvigandhi_1
1
answer
True or False :If the expression of $(x-\large\frac{1}{x^2})^{2n}$ contains a term independent of $x$,then $n$ is a multiple of $2$
cbse
math
class11
ch8
binomial-theorem
exemplar
q39
sec-a
easy
asked
Jun 25, 2014
by
sreemathi.v
1
answer
The number of diagonals in a octagon will be
cbse
math
class11
ch7
permutations-and-combinations
additionalproblem
q39
sec-b
medium
asked
Jun 20, 2014
by
sreemathi.v
1
answer
Which of the following is correct?
cbse
math
class11
ch3
trigonometric-functions
exemplar
q39
sec-a
easy
asked
May 20, 2014
by
sreemathi.v
1
answer
The number of words which can be formed out of the letters of the word ARTICLE,so that vowels occupy the even place is
cbse
math
class11
ch7
permutations-and-combinations
exercise7-3
exemplar
q39
sec-b
medium
asked
May 16, 2014
by
sreemathi.v
1
answer
Which of the following is correct
cbse
math
class11
ch3
trigonometric-functions
exemplar
q39
sec-c
difficult
asked
Apr 21, 2014
by
sreemathi.v
0
answers
If $A$ is an $3\times 3$ non-singular matrix such that $A A' = A' A$ and $B = A^{-1} A'$, then $B B'$ equals
jeemain
math
matrices-and-determinants
jeemain-2014
q39
asked
Apr 6, 2014
by
balaji.thirumalai
0
answers
Glucose reacts with $X$ number of molecules of phenylhydrazine to give osazone .The value of $X$ is
jeemain
aipmt
chemistry
biomolecules
organic-chemistry
cbse
class12
unit16
medium
q39
asked
Mar 28, 2014
by
thanvigandhi_1
2
answers
Which will not undergo diazotization?
jeemain
aipmt
chemistry
nitrogen
organic-chemistry
cbse
class12
unit13
q39
medium
asked
Mar 26, 2014
by
thanvigandhi_1
1
answer
The Axles are made by heating rods of iron embedded in charcoal powder . This process is known as
jeemain
cbse
chemistry
class12
unit6
general-principals-and-processes-of-isolation-of-metals
q39
medium
asked
Mar 17, 2014
by
meena.p
2
answers
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