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Resonance occurs in a series LCR ckt when the frequency of the applied emf is 1000 Hz.Then (a)when frequency=900 Hz, then the current through the voltage source will be ahead of emf of the source. (b)the impedence of the circ ...
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(a)A zinc rod weighing 25.00 g was kept in 100 mL of 1 M CuSO4 solution.After a certain time molarity of Cu2+ in solution was 0.8 M.What was the molarity of the sulphate ion(SO42-)?What was the weight of the zinc rod after cl ...
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Two long, parallel conductors carry currents i1=3.0 A and i2=3.0 A, both directed into the page, detemine the magnitude of the resultant magnetic field at point P. *Image* ...
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What is the geometry of XeOF3 ...
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Let F,FN and f denote the magnitudes of the contact force,normal force and the friction exerted by one surface on the other kept in contact.If none of these is zero, (a)F>FN (b)F>f (c)FN>f (d)FN-f<F<FN+f ...
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Why is the value of log-3-27 ≠3? Because... log-3-27 = log-3(-3 * 9)=log-3-3 + log-39 = 1 + 2 = 3 ...
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1. Sate two limitation of Bhor's theory of Hydrogen. 2.Show that maximum no.of electrons in an energy level of an atom is 2n2. ...
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two set of four quantum no of an electron are written below a. ( n=4, l=3, m=3, s=1/2 ) b. ( n=3, l=2, m=-2, s=0 ) which one of this set is not correct and why. ...
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Some converging light rays fall on a convex mirror of focal length of 30 cm. In absence of the mirror the rays could meet at distance of 20 cm from the pole of the mirror. Where do the rays meet in presence of the mirror? ...
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A man weighing 60kg stands on an immobile platform ( a disc) with a mass of 100 kg.What are the no. of revolutions per minute made by the platform if the man moves along a circle with a radius of 5 mts. around the axis of rot ...
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A rod of length L and mass M is fixed at one of its end and is free to rotate about that point.A pendulum of mass m(the bob) and length L also hangs from that position.Now the bob of pendulum is allowed to fall from height L ...
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A point object is moving on principal axis of a fixed spherical mirror.As the point object approaches the focus is it necessary that the image moves away from the focus?? Is it correct that product of magnitude of object dist ...
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Some converging light rays fall on a convex mirror of focal length of 30 cm. In absence of the mirror the rays could meet at distance of 20 cm from the pole of the mirror. Where do the rays meet in presence of the mirror? ...
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A closed loop of cross sectional area 10-2 m2 which has inductance L= 10 mH and negligible resistance is placed in a time varying magnetic field.The figure shows the variation of B with time for the interval 4 sec.The field i ...
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In the figure shown a light container is kept in a horizontal rough surface of coefficient of friction μ= sh/v .A very small hole of area s is made at a depth h.Water of volume v is filled in the container.The friction is no ...
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Nuclei of radioactive element A are produced at rate t2 at any time t.The element A has decay constant λ.Let N be the number of nuclei of element A at any time t.At tinme t=t0 , dN/dt is minimum.Then find the number of nucle ...
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In a series LCR circuit the frequency of the source is half of the resonance frequency. Then how can I comment about the nature of the circuit,,,like whether it is capacative or inductive or purely resistive?? ...
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A particle is projected vertically upwards and reaches the maximum height H in time T. The height of the particle at any time t will be (a)g(t-T)2 (b)H-g(t-T)2 (c) g(t-T2)/2 (d)H- g(t-T)2/2 ...
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\hspace{-16}\bf{\int\tan^{2}(x).\sin^{-1}(\tan x-x)dx} ...
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The value of lim (n -> ∞) [sum (r varies 1 to n) {1/2r}], where [.] -> G.I.F is ................ ...
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\hspace{-16}$If $\bf{p(x)}$ is a Quadratic Polynomial with Real Coeff. satisfying\\\\ $\bf{x^2-2x+2\leq p(x)\leq 2x^2-4x+3\;\forall x\in \mathbb{R}}$ and $\bf{p(11)=181}$\\\\ Then $\bf{p(2012)=}$ ...
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The value of lim (n -> ∞) [sum (r varies 1 to n) {1/2r}], where [.] -> G.I.F is ................ ...
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If atom X has 6 unpaired electrons.Find probable atomic number of X. Consider elements upto atomic number 50. ...
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If atom X has 6 unpaired electrons.Find probable atomic number of X. Consider elements upto atomic number 50. ...
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\hspace{-16}$Find total no. of matrices for which Inverse of a matrix is exists\\\\ If its element are taken from the set $\bf{\left\{0,1\right\}}$ ...
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If atom X has 6 unpaired electrons.Find probable atomic number of X. Consider elements upto atomic number 50. ...
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\hspace{-16}\bf{\mathbb{F}}$ind Real values of $\bf{x}$ that satisfy the equation\\\\ $\bf{4^{x.\sin^{-1}(x)}+4^{x.\cos^{-1}(x)}=2^{\frac{2+\pi.x}{2}}}$ ...
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\hspace{-16}$Find all Real values of $\bf{x}$ that satisfy the equation\\\\ $\bf{x^2=4+[x]}$\\\\ Ans = - 2 and x = 6 I have solved it using very Lengthy Method can anyone have a analytical Method without Using Graph ...
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If a and b are two vectors then the value of (a+b)x(a-b) is (a)2(bxa) (b)-2(bxa) (c)bxa (d)axb ...
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A particle is moving in a circle of radius 4 cm with constant speed of 1m/s.Find average acceleration in a time interval from t=0 to t=T/4.Here,T is the time period if the particle.Give only the magnitude.(T turns out be abou ...
