If two circles, each of radius 5 unit, touch each other at (1,2) and equation of their common tangent is 4x + 3y =0 ,then equation of the circle a portion of which lies in the all the quadrants is?

Anonymous User Maths Circle 30 Jan, 2020 117 views

The centre of a circle is (2, -3) and the circumference is 10 pie. The equation of circle is?

Anonymous User Maths Circle 30 Jan, 2020 93 views

The equation of the circle radius 5 in the first quadrant which touches x- axis and the line 4y = 3x is?

Anonymous User Maths Circle 29 Jan, 2020 110 views

The slope of the tangent at the point (h,h) on the circle

is?

Anonymous User Maths Circle 28 Jan, 2020 184 views

A lift of mass 920 kg has a capacity of 10 persons. If average mass of person is 68 kg. Friction force between lift and lift shaft is 6000 N. The minimum power of motor required to move the lift upward with constant velocity 3 m/s is

Anonymous User Physics 24 Jan, 2020 215 views

An inductor of inductance 10 mH and a resistance of  is connected to a battery of 20 V at t = 0. Find the ratio of current in circuit at t = infinity to current at t = 40 sec.

Anonymous User Physics 24 Jan, 2020 154 views

A capacitor of 60 pF charged to 20 volt. Now battery is removed and then this capacitor is connected to another identical uncharged capacitor. Find heat loss in nJ.

Anonymous User Physics 24 Jan, 2020 114 views

A battery of unknown emf connected to a potentiometer has balancing length 560 cm. If a resistor of resistance

is connected in parallel with the cell the balancing length change by 60 cm. If the

internal resistance of the cell is

, the value of 'n' is

Anonymous User Physics 24 Jan, 2020 121 views

Half life of 90Sr is 6.93 years. In a child body 1 ug of 90Sr dopped in place of calcium, how many years will it take to reduce its concentration by 90% (Assume no involvement of Sr in metabolism).

Anonymous User Chemistry 21 Jan, 2020 221 views

Cl2 on reaction with hot & conc. NaOH gives two chlorine having products X and Y. On treatment with AgNO3, X gives precipitate. Determine average bond order of Cl and O bond in 'Y' ?

Anonymous User Chemistry 21 Jan, 2020 162 views

Each of solution A and B of 100 L containing 4 g NaOH and 9.8 g H2SO4. Find pH of solution which is obtain by mixing 40 L solution of A and 10 L solution of B?

Anonymous User Chemistry 21 Jan, 2020 180 views

Purest form of commercial iron is?

Anonymous User Chemistry 21 Jan, 2020 106 views

Focal length of convex lens in air is 16 cm (glass = 1.5). Now the lens is submerged in liquid of refractive index 1.42. Find the ratio of focal length in medium to focal length in air has closest value?

Anonymous User Physics 21 Jan, 2020 90 views

An ideal fluid is flowing in a pipe in streamline flow. Pipe has maximum and minimum diameter of 6.4 cm and 4.8 cm respectively. Find out the ratio of minimum to maximum velocity?

Anonymous User Physics 21 Jan, 2020 107 views

Activity of a substance changes from 700 s–1 to 500 s–1 in 30 minute. Find its half-life in minutes?

Anonymous User Physics 21 Jan, 2020 118 views

Cascaded Carnot engine is an arrangement in which heat sink of one engine is source for other. If high temperature for one engine is T1, low temperature for other engine is T2 (Assume work done by both engine is same) Calculate lower temperature of first engine.

Anonymous User Physics 21 Jan, 2020 202 views

In a house 15 Bulbs of 45W,15 bulbs of 100W,15 bulbs of 10W and Two heaters of 1KW each is connected to 220 V Mains supply then find minimum fuse current?

Anonymous User Physics 21 Jan, 2020 88 views

If weight of an object at pole is 196 N then weight at equator is [g = 10 m/s2 ; radius of earth = 6400 Km]

Anonymous User Physics 20 Jan, 2020 172 views

Calculate the wavelength emitted during the transition of electron in between two levels of Li2+ ion whose sum is 4 and difference is 2.

Anonymous User Chemistry 19 Jan, 2020 181 views

Why electron cannot exist inside the nucleus according to Heisenberg’s uncertainty principle?

Anonymous User Chemistry 18 Jan, 2020 94 views

Organisms produced through asexual reproduction have low adaptability to the changing environment. Justify the statement

Anonymous User Biology 17 Jan, 2020 83 views

How much amount of energy will be liberated from 2 moles of glucose through cellular respiration?

Anonymous User Biology 17 Jan, 2020 71 views

Why Antibiotics can not kill viruses?

Anonymous User Biology 08 Jan, 2020 83 views

The real value of 'a' for which sum of square of the roots of the equation x*x -(a-3)x -(a+1) =0 assume the least value is?

Anonymous User Maths 06 Jan, 2020 83 views

How does cortical reaction prevents the entry of additional sperms into ovum?

Anonymous User Biology 03 Jan, 2020 81 views

Pollen grains are well preserved as microfossils due to the presence of sporopollenin. Explain the statement?

Anonymous User Biology 02 Jan, 2020 79 views

How does dicliny differs from prepotency as two outbreeding contrivances?

Anonymous User Biology 02 Jan, 2020 88 views

The chance of survival among young ones of viviparous animals are more than those of oviparous animals, why?

Anonymous User Biology 02 Jan, 2020 107 views

Name an organism showing oblique binary fission?

Anonymous User Biology 02 Jan, 2020 82 views

What are Lipids? Explain its functions?

Anonymous User Biology 26 Dec, 2019 79 views

What is Cytoskeleton? Please explain?

Anonymous User Biology 21 Dec, 2019 64 views

A regular polygon of nine sides, each of length 2, is inscribed in a circle. The radius of the circle is?

Anonymous User Maths 19 Dec, 2019 113 views

Why Berilium and Al are placed in different periods and groups but they show similar properties?

Anonymous User Chemistry 02 Dec, 2019 91 views

Why The radii of Ar is greater than the radii of chlorine?

Anonymous User Chemistry 02 Dec, 2019 86 views

Why Viroids differ from viruses?

Anonymous User Biology 02 Dec, 2019 78 views

A swimmer can swim in still water with a speed of 5 m/s. While crossing a river his average speed is 3 m/s. If he cross the river in the shortest possible time, what is the speed of flow of water?

Anonymous User Physics 28 Nov, 2019 1643 views

Lichens are well known combination of an alga and a fungus where fungus has?

Anonymous User Biology 27 Nov, 2019 99 views

A current of 3 ampere was passed for 2 hours through a solution of CuSO4. 3 gm of Cu2+ ions were discharged at cathode calculate the current efficiency.

Anonymous User Chemistry 23 Nov, 2019 1244 views

Cellulose is the major component of cell walls of?

Anonymous User Biology 22 Nov, 2019 95 views

The imperfect fungi which are decomposers of litter and help in mineral cycling belong to?

Anonymous User Biology 20 Nov, 2019 79 views

Chrysophytes, Euglenoids, Dinoflagellates and Slime moulds are included in the kingdom?

Anonymous User Biology 20 Nov, 2019 74 views

Bacterial cell divides every one minute. It takes 15 minutes a cup to be one-fourth full. How much time will it take to fill the cup?

Anonymous User Biology 20 Nov, 2019 218 views

Domain Eukarya includes how many kingdoms (w.r.t. six kingdom system)?

Anonymous User Biology 19 Nov, 2019 194 views

The protein coat called capsid made of small subunits called capsomeres are present in?

Anonymous User Biology 19 Nov, 2019 154 views

The sex organs are absent, but plasmogamy is brought about by fusion of two vegetative or somatic cells of different genotypes. It is the feature of?

Anonymous User Biology 18 Nov, 2019 711 views