List of top Questions asked in KEAM

Weight of a body of mass m in its fall above the surface of the earth is
Two satellites A and B are orbiting a planet in circular orbits with radii 2R and R respectively. If the speed of satellite A is 2v, then the speed of satellite B is
If the potential at A is greater than the potential at B, then the equivalent resistance of the circuit across AB is
If the potential at A is greater than the potential at B
A man weighing 70 kg is riding on a cart of mass 30 kg which moves along a level floor at a speed of 3 ms-1. If he runs on the cart so that his velocity relative to the cart is 4ms-1 in the direction opposite to the motion of the cart, the speed of centre of mass of the system is
If 11Pr=7920 and 11Cr = 330, then the value of r is equal to
Let ⊙ be a binary operation on Q - {0} defined by a⊙b=\(\frac{a}{b}\). Then 1⊙(2⊙(3⊙4)) is equal to
The complexes [Co(NH3)5NO2]Cl2 and [Co(NH3)5ONO]Cl2 are
In a reaction 3A → Products, the concentration of A decreases from 0.4molL-1 to 0.1molL-1 in 20 minutes at 300K. The rate of decrease in [A] during this interval (in molL-1min-1) at 300K is
Let A = {x∈Z: -1 ≤ x < 4} and let B = {x ∈ Z:0 < \(\frac{x}{2}\) ≤ 3}. Then A∩B is equal to
The three vertices of a triangle are (0, 0), (3, 1) and (1, 3). If this triangle is inscribed in a circle, then the equation of the circle is
If z1 and z2 are two different complex numbers with |z2|=1, then \(|\frac{1-\bar{z_1}z_2}{z_1-z_2}|\)is equal to
The equation of the circle touching the x-axis at (5, 0) and the line y = 10 is
If \(z=\frac{(3+i)(7-i)^2}{3-i}\), then the value of |z| is equal to
\(\displaystyle\lim_{x\rightarrow-2}\frac{3x^2+ax-2}{x^2-x-6}\) is a finite number, then the value of a is equal to
The end points of the major axis of an ellipse are (2, 4) and (2,-8). If the distance between foci of this ellipse is 4, then the equation of the ellipse is
If the solution set of the inequality \(|a+3x|\leq6\ is\ [\frac{-8}{3},\frac{4}{3}]\), then the value of a is
Let L1 be the line joining (0, 0, 0) and (1, 2, 3) and L2 be the line joining (2, 3, 4) and (3, 4, 5). The point of intersection of L1 and L2 is
Which of the following aryl chlorides on warming with water forms the corresponding phenol?
Given below are the velocity-time graph of five particles, A, B, C, D and E. The correct graph from the following v-t plot in which the velocity if the particle is a function of t2 is
A tuning fork produces 4 beats per second with both 26.0 cm and 25.2 cm of stretched sonometer wire. Frequency of the fork is
If n(A∪B)=97, n(A∩B) = 23 and n(A-B)=39, then n(B) is equal to
If \(f(x) =   \begin{cases}     x^2\sin(\frac{\pi}{6}x)       & for\ x\leq-3 \\      x\cos(\frac{\pi}{3}x)       & for\ x\gt-3   \end{cases}\), then the value of \(\displaystyle\lim_{x\rightarrow3}f(x)\ is\ equal\ to\)
Consider the linear programming problem:
Maximize   z=10x+5y
subject to the constraints
2x+3y≤120
2x + y ≤ 60
x,y≥0.
Then the coordinates of the corner points of the feasible region are
The integrating factor of the differential equation 4xdy-e-2y dy + dx = 0 is
The general solution of the differential equation \((x^2y^2+y)dx-(x-2x^3y)dy=0\) is