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Ques 1) A solid Copper cube of edge 1 cm is suspended in an evacuated enclosure. It's temperature is found to fall from 100 ° C to 99 ° C in 100 sec. Another solid copper cube of edge 2 cm with similar manner. The time requ ...
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Ques 1) If C is the centre and A,B are two points on the conic 4x^{2}\ +\ 9y^{2} - 8x - 36y + 4 = 0 such that angle ACB = \pi /2 , then CA -2 + CB -2 is equals to :- (a) 13/36 (b) 36/13 (c) 16/33 (d) 33/16 Ques 2) If p and P' ...
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Ques 1) Figure (a) *Image* Three progressive waves A,B and C are shown in the figure. With respect to wave A, the wave C (a) lags behind the phase by \pi /2 and B leads by \pi /2 (b) leads in phase by \pi /2 and B lags behind ...
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How to find the wedge constraint using the method of "net Work done by internal forces (in a system) is zero. " http://targetiit.com/iit-jee-forum/posts/constraint-equation-471.html For example, in the below figure..suppose t ...
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*Image* Determine the equivalent capacitance between a and b. Each of the capacitor has capacity C. ...
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Ques 1) If excess charge is placed on a spherical shell that is made up of conducting material, then the excess charge spreads uniformly over the external surface. Is this true in case if the shell is made up of NON CONDUCTIN ...
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*Image* Show that when when a bar of length l, breadth b, and depth d (supported near its ends) , when loaded at the centre by a load W sags by an amount given by \delta = \frac{ W\l^{\3}}{4\ b\ d^{\3}\ Y} where Y is the Youn ...
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Prove that :- \sum_{r=1}^{n}{tan\ r\ \alpha }\ .\ tan\ (r+1)\ \alpha = cot\ \alpha \ . \ tan\ (n+1)\ \alpha\ - n - 1 ...
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*Image* *Image* EDIT:- In Q3 b) part, heat is also there ...
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Ques 1) The below is a number puzzle. It should be read left to right, top to bottom. 1 1 1 2 1 1 2 1 1 1 1 1 2 2 1 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? Question (a): What is the next two rows of numbers? Question (b): How was thi ...
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Ques 1) Long long ago, there was a primitive island in Europe having n number of inhabitants on it. All the inhabitants of island compulsorily use to meet each other, each evening at grand get together. In one similar evening ...
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Ques 1) Mr. Intelligent was going for a morning walk and he met Mr. Puzzle. Mr. Puzzle asked " I have three sons and product for their ages is 36 , so tell me their ages ". Mr. Intelligent thought for a moment and asked for o ...
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*Image* Ques 1) Figure shos a long current carrying wire and two rectangular loops moving with velocity v . Find the direction of current. Ques 2) A rod of length L is placed prependicular to a long wire carrying current i. T ...
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*Image* Ques 3) Which one of the following has a dipole moment significantly different from zero ?? *Image* Ques 4) Which one of the following has smallest heat of combustion ? Ques 5)Among xylenes, which is thermodynamically ...
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*Image* Ques 1) A,B, and C are the three particles of a medium whichn are equally seperated along the x-axis. When a sinusodial transverse wave of wavelength lambda propagates along x-axis, the following observations were mad ...
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Scandium (Z = 21) shows variable oxidation states or not ??? *Image* *Image* NCERT says NO, but Brett Lee says YES. ...
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*Image* Ques 1) Find out the net downward thrust on the curved surface of a bucket full of water of height h and radii a and b. Ques 2) A small uniform tube is bent into a circle of radius r whose plane is vertical. Equal vol ...
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*Image* Consider a rectangular tank of size (l X b) filled with a liquid of density roh to a height h as shown in the figure. Then draw the free body diagram of liquid (showing only the vertical forces) and also draw the forc ...
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*Image* Ques 7) Whcih equilibrium is not rapid at room temperature ? *Image* Ques 8) *Image* Consider the following energy profiles where A reacts with reagent B and gets converted to C, and B reacts with same reagent (R) und ...
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Ques 1) Among the following, the optically inactive compound is *Image* Ques 2) The binapthol (Bnp) is *Image* (a) an optically active compound having chiral centre (b)an optically inactive compound (c) a meso compound ( d)an ...
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Ques 1) Consider the following statements The rate law for the acid catalysed hydrolysis of an ester is given as Rate = k [H+] [ester] = k' [ester] , if the acid concentration is doubled at constant ester concentration. 1) Th ...
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*Image* How many enantiomers and diastereomers are possible ? (a) 2 , 2 (b) 4, 4 (c) 4,2 (d) 2,4 Enatiomers to 2 hi hai, but dbt is with diastereomers. ...
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Ques 1) Water is brought under a pressure of 1 atm. When an electric current of 0.5 A from a 12 V supply is passed for 300 sec through a resistance in thermal contact with it, it is found that 0.789 g of water is vaporized. C ...
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Ques 1) If the point (cos θ , sin θ ) does not fall in that angle between the lines y = |x-1| in which the origin lies, then θ belongs to (a) (∩ /2 . 3∩ /2) (b) (-∩/2 , ∩/2) (c) (0,∩) (d) none of these Ques 2) If ...
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Ques 1) Find the electric field vector at P (a,a,a) due to three infinitely long lines of charges along x,y and z - axes respectively. The charge density i.e is charge per unit length of each wire is @. *Image* Ques 2) A syst ...
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Ques 1) *Image* Ques 2) Following synthesis is effective when CH3CO C l + R2 Cd → RCOCH3 + R Cd C l R is of the type :- (a) (CH3)2 CH - (b) (CH3)3C CH2- (c) (C6H5)2 CH- (d) All of these ...
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In how many ways we can place one white and one black rook on a chessboard so that they do not attack each other ? ...
