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JEEMAIN PAST PAPERS
The velocity of image will be :
jeemain
physics
class12
unit16
ray-optics-and-optical-instruments
reflection-by-mirrors
medium
asked
Feb 11, 2014
by
meena.p
1
answer
Find the equation of circle passing through (0,0) and (0,B)?
jeemain
math
class11
coordinate-geometry-conic -sections
circle
ch11
q130
medium
asked
Feb 11, 2014
by
sreemathi.v
1
answer
Find the area of equilateral triangle inscribed in the circle $x^2+y^2+2gx+2fy+c=0$?
jeemain
math
class11
coordinate-geometry-conic -sections
circle
ch11
q129
medium
asked
Feb 11, 2014
by
sreemathi.v
1
answer
Find the centre and radius of the circle $x^2+y^2-2x-4y=9$.
jeemain
math
class11
coordinate-geometry-conic -sections
circle
ch11
q128
medium
asked
Feb 11, 2014
by
sreemathi.v
1
answer
Where should an object be placed in from of a concave mirror of focal length 30 cm so that the image size is 5 times the object size?
jeemain
physics
class12
ray-optics-and-optical-instruments
reflection-by-mirrors
medium
asked
Feb 11, 2014
by
meena.p
1
answer
An object moves with 5 m/s towards right while mirror moves with 1 m/s towards the left as shown. Find velocity of image.
jeemain
physics
class12
unit16
ray-optics-and-optical-instruments
reflection-by-mirrors
easy
asked
Feb 11, 2014
by
meena.p
1
answer
Two plane mirrors are inclined to each other such that a ray of light incident on first mirror and parallel to second is reflected from second mirror parallel to first mirror. Find angle between two mirrors.
jeemain
physics
class12
unit16
ray-optics-and-optical-instruments
reflection-by-mirrors
medium
asked
Feb 11, 2014
by
meena.p
1
answer
A tow truck drags a stationary car along the road. The chain makes an angle of 30 degrees with the road and the tension in the chain is 1500 N. How much work is done (in Joules) by the truck in pulling the car 1 km (approximate answer, rounded off)?
jeemain
math
vector-algebra
cbse
class12
ch10
vector-product
difficult
asked
Feb 11, 2014
by
balaji.thirumalai
1
answer
There is a point object and a plane mirror . If the mirror is moved by 10 cm away from object , find distance which the image will move by
jeemain
physics
class12
unit16
ray-optics-and-optical-instruments
reflection-by-mirrors
easy
asked
Feb 10, 2014
by
meena.p
1
answer
A Point source of light B is placed at a distance L in front of centre of a mirror of width d hung vertically on a wall. A man walks in front of the mirror along a line parallel to mirror at a distance 2L from it as shown. Find greatest distance over which he can see the image of light source in mirror.
jeemain
physics
class12
unit16
ray-optics-and-optical-instruments
reflection-by-mirrors
medium
asked
Feb 10, 2014
by
meena.p
1
answer
The equivalent resistance between the points A and B is
jeemain
physics
current-electricity
cbse
class12
ch5
equivalent-resistance
easy
asked
Feb 10, 2014
by
thanvigandhi_1
1
answer
For what value of $R$ will the current passing through the $4\: ohm$ resistor is zero
jeemain
physics
current-electricity
cbse
class12
ch5
kirchoffs-law-wheatstone-bridge
difficult
asked
Feb 10, 2014
by
thanvigandhi_1
1
answer
Calculate the charge on the $5\mu F$ capacitor long time after assembling the circuit
jeemain
physics
current-electricity
cbse
class12
ch3
q69
difficult
asked
Feb 10, 2014
by
thanvigandhi_1
1
answer
Write equation of circle whose diametrically opposite point are (1,2) & (-1,-2) is?
jeemain
math
class11
coordinate-geometry-conic -sections
circle
ch11
q127
medium
asked
Feb 10, 2014
by
sreemathi.v
1
answer
Minimum size of plane mirror, required to see full image of an observer is :
jeemain
physics
class12
unit16
ray-optics-and-optical-instruments
reflection-by-mirrors
medium
asked
Feb 10, 2014
by
meena.p
2
answers
The radius of a circle with it's center at $(2,1)$ and whose one chord is the diameter of the circle $x^2+y^2-2x-6y+6=0$ is:
jeemain
math
class11
coordinate-geometry-conic -sections
circle
ch11
medium
asked
Feb 10, 2014
by
sreemathi.v
1
answer
The resistor which will dissipate maximum power is
jeemain
physics
current-electricity
cbse
class12
ch5
equivalent-resistance
difficult
asked
Feb 10, 2014
by
thanvigandhi_1
1
answer
In the circuit shown, if a wire is connected between points A and B, how much current will flow through it?
jeemain
physics
current-electricity
cbse
class12
ch5
equivalent-resistance
difficult
asked
Feb 10, 2014
by
thanvigandhi_1
1
answer
Find the equivalent resistance between A and B
jeemain
physics
current-electricity
cbse
class12
ch5
equivalent-resistance
easy
asked
Feb 10, 2014
by
thanvigandhi_1
1
answer
Find region on Y axis in which reflected rays are present object is at A(2,0) and MN is a plane mirror as shown:
jeemain
physics
class12
unit16
ray-optics-and-optical-instruments
reflection-by-mirrors
easy
asked
Feb 10, 2014
by
meena.p
1
answer
Find the length of sub tangent and sub-normal?(for hyperbola)
jeemain
math
class11
coordinate-geometry-conic -sections
hyperbola
ch11
q125
difficult
asked
Feb 10, 2014
by
sreemathi.v
1
answer
Find the equation of a diameter bisecting a system of parallel chords of slope m of the hyperbola $\large\frac{x^2}{a^2}-\frac{y^2}{b^2}$$=1$?
jeemain
math
class11
coordinate-geometry-conic -sections
hyperbola
ch11
q124
difficult
asked
Feb 10, 2014
by
sreemathi.v
1
answer
The image of object A in mirror MN will be
jeemain
physics
class12
unit16
ray-optics-and-optical-instruments
reflection-by-mirrors
easy
asked
Feb 10, 2014
by
meena.p
1
answer
A submarine on the surface of the ocean, is on a course parallel to and 60 Km from the shore line as shown in the figure. There are two transmitters, X and Y located 200 Km from each other on the shore line. The submarine uses the signals to figure out that its 50 Km closer to station Y than to X. Find the distance between the submarine to each of the stations.
jeemain
math
class11
coordinate-geometry-conic -sections
hyperbola
ch11
difficult
asked
Feb 10, 2014
by
sreemathi.v
1
answer
Find the equation and length of common tangent to hyperbola $\large\frac{x^2}{p^2}-\frac{y^2}{q^2}$$=1$ and $\large\frac{y^2}{p^2}-\frac{x^2}{q^2}$$=1$
jeemain
math
class11
coordinate-geometry-conic -sections
hyperbola
ch11
q122
difficult
asked
Feb 10, 2014
by
sreemathi.v
1
answer
Find the equation of an rectangular hyperbola whose centre is origin and its asymptotes coincide with the co-ordinate axes?
jeemain
math
class11
coordinate-geometry-conic -sections
hyperbola
ch11
q121
medium
asked
Feb 10, 2014
by
sreemathi.v
1
answer
Find the equation of asymptotes for the hyperbola $\large\frac{x^2}{a^2}-\frac{y^2}{b^2}$$=1$?
jeemain
math
class11
coordinate-geometry-conic -sections
hyperbola
ch11
q120
medium
asked
Feb 10, 2014
by
sreemathi.v
1
answer
Find the locus of intersection of two perpendicular tangent to the hyperbola $\large\frac{x^2}{a^2}-\frac{y^2}{b^2}$$=1$?
jeemain
math
class11
coordinate-geometry-conic -sections
hyperbola
ch11
q119
medium
asked
Feb 10, 2014
by
sreemathi.v
1
answer
Two identical charges are placed at the two corners of an equilateral triangle . The potential energy of the system is $\;\sqcup\;.$ The work done in bringing an identical charge from infinity to the third vertex is
jeemain
physics
class12
ch2
electrostatics
electrostatic-potential-and-capacitance
electrostatic-potential-energy-of-a-system-of-charges
medium
asked
Feb 10, 2014
by
yamini.v
1
answer
Find the equation of chord of contact for hyperbola $\large\frac{x^2}{a^2}-\frac{y^2}{b^2}$$=1$?
jeemain
math
class11
coordinate-geometry-conic -sections
hyperbola
ch11
q118
medium
asked
Feb 10, 2014
by
sreemathi.v
1
answer
The hydrogen-like species $Li^{2+}$ is in a spherically symmetric state $S_1$ with one radial node. Upon absorbing light the ion undergoes transition to a state $S_2$ has one radial node and its energy is equal to the ground state energy of hydrogen atom. The orbital angular momentum quantum number of the state $S_2$ is
jeemain
chemistry
physical-chemistry
class11
unit2
atomic-structure
quantum-mechanical-model
easy
q200
mock
asked
Feb 10, 2014
by
sharmaaparna1
1
answer
The hydrogen-like species $Li^{2+}$ is in a spherically symmetric state $S_1$ with one radial node. Upon absorbing light the ion undergoes transition to a state $S_2$ has one radial node and its energy is equal to the ground state energy of hydrogen atom. Energy of the state $S_1$ in units of the hydrogen atom ground state energy is
jeemain
chemistry
physical-chemistry
class11
unit2
atomic-structure
bhor's-model
medium
q199
asked
Feb 10, 2014
by
sharmaaparna1
1
answer
Find the equation of normal for the hyperbola $\large\frac{x^2}{a^2}-\frac{y^2}{b^2}$$=1$ in parametric form?
jeemain
math
class11
coordinate-geometry-conic -sections
hyperbola
ch11
q117
medium
asked
Feb 10, 2014
by
sreemathi.v
1
answer
Find the equation of normal to the hyperbola $\large\frac{x^2}{a^2}-\frac{y^2}{b^2}$$=1$ at $(x_1,y_1)$ ?
jeemain
math
class11
coordinate-geometry-conic -sections
hyperbola
ch11
q116
medium
asked
Feb 10, 2014
by
sreemathi.v
1
answer
The hydrogen-like species $Li^{2+}$ is in a spherically symmetric state $S_1$ with one radial node. Upon absorbing light the ion undergoes transition to a state $S_2$ has one radial node and its energy is equal to the ground state energy of hydrogen atom. The state $S_1$ is
jeemain
chemistry
physical-chemistry
class11
unit2
atomic-structure
quantum-mechanical-model
difficult
q198
asked
Feb 10, 2014
by
sharmaaparna1
1
answer
De-Broglie proposed dual nature for electron by putting his famous equation $\lambda = \large\frac{h}{mu}$. Later on Heisenburg proposed uncertainity principle as $\bigtriangleup p .\bigtriangleup x \geq \large\frac{h}{2}(h = \large\frac{h}{2\pi})$ . On the contrary particle nature of electron was established on the basis of photoelectric effect. When a photon strikes the metal surface , it gives up its energy to the electron. Part of this energy (say w) is used by the electron to escape from the metal and the remaining imparts the kinetic energy $\large\frac{1}{2}mu^2$ to the photoelectron. The potential applied on the surface to reduce the velocity of photoelectron to zero is known as stopping potential. The wavelength of a golf ball weighing 200g and moving at a speed of 5meter/hr is of the order:
jeemain
chemistry
physical-chemistry
class11
unit2
atomic-structure
quantum-mechanical-model
easy
q197
asked
Feb 10, 2014
by
sharmaaparna1
1
answer
Find the equation of tangent for the hyperbola $\large\frac{x^2}{a^2}-\frac{y^2}{b^2}$$=1$ in parametric form?
jeemain
math
class11
coordinate-geometry-conic -sections
hyperbola
ch11
q115
medium
asked
Feb 10, 2014
by
sreemathi.v
1
answer
Current passing through the $1\: ohm$ resistor is zero. The value of $ E$ is
jeemain
physics
current-electricity
cbse
class12
ch5
electric-current-concepts
easy
asked
Feb 10, 2014
by
thanvigandhi_1
1
answer
An ammeter and a voltmeter are joined in series to a battery. Their readings are $A$ and $V$ respectively. If a resistance is now joined in parallel with the voltmeter
jeemain
physics
current-electricity
cbse
class12
ch5
meter-bridge-potentiometer-instrumentation
difficult
asked
Feb 10, 2014
by
thanvigandhi_1
1
answer
De-Broglie proposed dual nature for electron by putting his famous equation $\lambda = \large\frac{h}{mu}$. Later on Heisenburg proposed uncertainity principle as $\bigtriangleup p .\bigtriangleup x \geq \large\frac{h}{2}(h = \large\frac{h}{2\pi})$ . On the contrary particle nature of electron was established on the basis of photoelectric effect. When a photon strikes the metal surface , it gives up its energy to the electron. Part of this energy (say w) is used by the electron to escape from the metal and the remaining imparts the kinetic energy $\large\frac{1}{2}mu^2$ to the photoelectron. The potential applied on the surface to reduce the velocity of photoelectron to zero is known as stopping potential. If uncertainities in position and momentum of an electron are same , then uncertainity in its velocity can be given by
jeemain
chemistry
physical-chemistry
class11
unit2
atomic-structure
quantum-mechanical-model
difficult
q196
asked
Feb 10, 2014
by
sharmaaparna1
1
answer
Find the equation of tangent for the hyperbola $\large\frac{x^2}{a^2}-\frac{y^2}{b^2}$$=1$?
jeemain
math
class11
coordinate-geometry-conic -sections
hyperbola
ch11
q114
medium
asked
Feb 10, 2014
by
sreemathi.v
1
answer
$50V$ battery is supplying a current of $10A$ when connected to a resistor. If the efficiency of the battery at this current is 25%, then the internal resistance is:
jeemain
physics
current-electricity
cbse
class12
ch3
q63
difficult
asked
Feb 10, 2014
by
thanvigandhi_1
1
answer
Which of these is correct for each pair of statements? \[\] Statement 1: $40W$ tube light appears brighter than a $40W$ bulb.\[\] Statement2: Light sources having same power rating appear to glow equally brightly
jeemain
physics
current-electricity
cbse
class12
ch5
electrical-energy-and-power
medium
asked
Feb 10, 2014
by
thanvigandhi_1
1
answer
For the equation to represent the hyperbola $\large\frac{x^2}{9-\lambda}+\frac{y^2}{6-\lambda}$$=1$ what should be the value of $\lambda$?
jeemain
math
class11
coordinate-geometry-conic -sections
hyperbola
ch11
q113
medium
asked
Feb 10, 2014
by
sreemathi.v
1
answer
De-Broglie proposed dual nature for electron by putting his famous equation $\lambda = \large\frac{h}{mu}$. Later on Heisenburg proposed uncertainity principle as $\bigtriangleup p .\bigtriangleup x \geq \large\frac{h}{2}(h = \large\frac{h}{2\pi})$ . On the contrary particle nature of electron was established on the basis of photoelectric effect. When a photon strikes the metal surface , it gives up its energy to the electron. Part of this energy (say w) is used by the electron to escape from the metal and the remaining imparts the kinetic energy $\large\frac{1}{2}mu^2$ to the photoelectron. The potential applied on the surface to reduce the velocity of photoelectron to zero is known as stopping potential. The binding energy of electron in a metal is 250 KJ/mol. The threshold frequency of metal is
jeemain
chemistry
physical-chemistry
class11
unit2
atomic-structure
bhor's-model
medium
q195
asked
Feb 10, 2014
by
sharmaaparna1
1
answer
Which of these is correct for each pair of statements? \[\] Statement 1: Resistance of $50W$ bulb is greater than that of a $100W$ bulb. \[\] Statement 2: Resistance of a bulb is inversely proportional to rated power.
jeemain
physics
current-electricity
cbse
class12
ch5
electrical-energy-and-power
easy
asked
Feb 10, 2014
by
thanvigandhi_1
1
answer
Which of these is correct for each pair of statements? \[\] Statement 1: The conductivity of molten electrolytes is smaller than common metallic conductors. \[\] Statement 2: Positive and negative ions flow in opposite directions.
jeemain
physics
current-electricity
cbse
class12
ch5
electric-current-concepts
easy
asked
Feb 10, 2014
by
thanvigandhi_1
1
answer
Which of these is correct for each pair of statements? \[\] Statement 1: When a battery is short-circuited, the terminal voltage is zero \[\] Statement 2: In the situation of a short-circuit, the current is zero
jeemain
physics
current-electricity
cbse
class12
ch5
electric-current-concepts
easy
asked
Feb 10, 2014
by
thanvigandhi_1
1
answer
Which of these is correct for each pair of statements? \[\] Statement 1: When an electric current at the junction of two wires of the same material is directed from the thick wire to the thin wire, the drift speed of the electrons increase as they pass through the cross-section \[\] Statement 2: The drift speed of electrons is directly proportional to the electric field in the wire.
jeemain
physics
current-electricity
cbse
class12
ch5
electric-current-concepts
easy
asked
Feb 10, 2014
by
thanvigandhi_1
1
answer
For what value of $\lambda$ does the line $y=2x+\lambda$ touches the hyperbola $16x^2-9y^2=144$?
jeemain
math
class11
coordinate-geometry-conic -sections
hyperbola
ch11
q112
medium
asked
Feb 10, 2014
by
sreemathi.v
1
answer
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