Two equal charges q of opposite sign separated by a distance 2a constitute an electric dipole of dipole moment p. If P is a point at a distance r from the centre of the dipole and the line joining centre to this point makes an angle θ with the axis of the dipole, then potential at the point P is given by
Two equal charges, q each are placed at a distance of 2a, and a third charge -2q is placed at the mid point. The potential energy of the system is
The electrochemical equivalent of magnesium is 0.126 mg/C. A current of 5 A is passed in a suitable solution for one hour. The mass of the magnesium deposited will be
Which of the following statement is true about p-type semiconductors?
In which of the following cases is the benzene ring deactivated for Friedel Craft's reaction and the product formed is a meta product?
Which of the following sequence is correct as per Aufbau principle?
Which of the following statements is false for the reaction H2 + Br2 →2HBr?
The rate law is 
Locus of mid point of the portion between the axes of x cosα + y sinα = p where p is constant is
The solution of the differential equation cos(x + y)dy = dx is
How many words can be formed by taking letters 4 at a time out of letters of the word MATHEMATICS?
If f x = x − x2 + x3 − x4 + … ∞ , | x | < 1, then f′(x) =
If the roots of 4x3 − 12x2 + 11 x + k = 0 are in A.P. then k =
If (a, b), (c, d), (e, f) are the verices of a triangle such that a, c, e are in G.P. with common ratio r and b, d, f are in G.P. with common ratio's then the area of the triangle is
The order of differential equation (d2y/dx2)2 = (1+dy/dx)1/2 is
For a frequency distribution mean deviation from mean is computed by