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We know that electric current is not a vector. Then in Kirchoff's law,why do we take negative value of current from our calculations to have a direction opposite to the assumed direction? ...

if 1/a+1/b=1/c,and a,b,c have no common factor...then prove that a+b is a perfect square. ...

g(x+1)+g(x-1)=g(x)..Find the period of g(x). ...

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*Image* *Image* EDITED - It indeed is " Sophomore's Dream " , as Sir has mentioned below . I actually got the result in a different way than what is done in many sites , so that ' s why I posted the quesion . ...

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Q.) 3 insulated conducting spheres A, B and C of radii a, b, c respectively (a<b<c) has charges q1, q2, q3 respectively. Find their- (i) potentials (ii) the reduction in the potential of the outermost sphere when the in ...

Q1 in a 100ml of an aqueous hydrochloric acid of ph 1.0 , 900 ml of more distilled water is added , the ph of the resultant soln will become_______ answer: 2.0 Q2 50 litres of 0.1M HCL is thouroughly mixed wid 50 litres of 0. ...

Draw the graph of Sin x and tan x between -pi/2 to pi/2 on the same sheet. * I am trying to post some very simple graphs for some new users who may not know the basics and I expect them to answer (some of the older/ more adva ...

help me out!.. the number f positive integral solutions of x4- y4 = 3789108 ...

if the sequence {an} ,satisfies the recurrence , an+1 = 3an -2an-1 for n>=2 a0 = 2 a1 = 3 Find a2007 ...

lim x→0 (sin x - tanx )2 + ( 1 - cos 2x )4 + x5/7 tan7 x + sin6 x + 2 .sin5 x i try expanding the numerator by substituting 2sin2x in place of ( 1 - cos 2x ).....am getting stuck after this.... ...

shud subjective problems be practised for JEE , especially like showing , proving etc.??? ...

well i had some doubts.......... the first one isn't really a study doubt....its a general query that came to my mind while reading abt the earth's magnetism.. as we know that the earth reverses both the magnitude as well as ...

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someone pleaz answer these ques.... 1) A bal is thrown vertically up wards. It is observed at a height h twice with a time interval t. The initial velocity of the ball is....... 2)A circus artist maintains 4 balls in motion . ...

what is the highest salary obtained at iits, nits? ...

Hi Friends, We are very pleased to tell you that 217 of our students have succeeded in IIT JEE exam 2010. These students were taking advantages of our video education. Once again we have proved that how helpful education thro ...

SINCE ARKA(REEK) IS LEAVIN FOR TECHNOINDIA KOLKATA WISH HIM A HAPPY ADIEU ............. HAVE A WONDERFUL LIFE AHEAD ARKA !!!!!!!!!!!!!!!!!!!!!![123] [124][125][126][127][128][129] ...

when will aieee 5th round result out? ...

Thanks all the user for making your TargetIIT a success. We have completed one year and that because of all you people. We hope to continue further in the future. So post your feedback here about TargetIIT. what you liked abo ...

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let x,y,z be complex numbers such that x + y+ z=2 x2 +y2+z2=3 xyz= 4 Find the value of *Image* ...

lim(x→∞)[(x2+1)/(2x2+x-1)-(x+1)/(4x+3)] ...

solve for x and y: x + y = 11 y + x = 7 ...

Evaluate: \int \sqrt{x+\sqrt{x^2+a^2}}dx ...

electrically charged drops of mercury fall from altitude h into a spherical metal vessel of radius R. in the upper part of which there is a small opening. The mass of each drop is m & charge is Q.What is the number 'n' of las ...

what is the difference between atomic weight and gram atomic weight of any element??? ...

In NCERT books,it is written that electron was discovered in 1859. Ohm's law was given before 1854 because Ohm died in 1854 and Coulomb' law was given before 1806 because coulomb died in 1806.We know that electron flow is kno ...

Let f(x) = x135 + x125 - x115 + x5 + 1. If f(x) is divided by x3 - x, then the remainder is some function of x say g(x). Find the value of g(10). ...