List of top Questions asked in KEAM

In dielectrics, polarization is the dipole moment per unit
The energy density of the electric field \( 2 \, \text{V/m} \) in a capacitor \( C \) is \( \varepsilon_0 \) is the permittivity of free space
When a current of 2 A flows through a wire for 2.5 s, the amount of heat liberated is 20 J. The resistance of the wire is
The magnetic moment of an electron revolving in an orbit of 0.5 m radius with a velocity of \( 8 \times 10^7 \, \text{m/s} \) is (in \( \text{Am}^2 \))
Angular momentum of a particle will not be zero, if the
An astronaut experiences weightlessness in space satellite because
For smaller deformations, stress is directly proportional to the strain for any material. Then the constant of proportionality is called as its
Which one of the following principles helps to explain the flow of blood in an artery?
If Q1 and Q2 are respectively the heat supplied and expelled by a system at a constant temperature, then the work done by the system is
A hockey player hits a ball with an impulse of 15 Ns. If time of hit is 0.2 s, the average force exerted by the player on the ball is
If the position of the particle as a function of time \( t \) is \( \vec{r} = 8t \hat{i} + 3t^2 \hat{j} + 3 \hat{k} \, \text{m} \), then the acceleration of the particle is (in \( \text{m/s}^2 \))
The force acting on the particle of 0.2 kg mass whose displacement is described by the equation \( x = 3t + 7t^2 \, \text{m} \)
A bullet of 10 g mass is fired at a speed of 50 m/s by a gun of 2 kg mass. The recoil speed of the gun (in m/s) is
The work done to lift a 60 kg mass to a height of 5 m from the ground is (g = 10 m/s\(^2\))
Energy equivalent of mass 0.5 kg is
Three particles of equal mass lie at distances of 1 cm, 2 cm, and 3 cm from the origin. The distance of their center of mass from the origin is
The number of moles of alkyl halides required to convert primary amine into quaternary ammonium salt is
The order of boiling point of the following amines is (i) Butan-1-amine
(ii) N-Ethylethanamine
(iii) N,N-Dimethylethanamine
An aromatic compound (X) of molecular formula, C7H7Cl, on ammonolysis gives Y (Molecular formula, C7H9N). The compound Y reacts with two moles of CH3Cl gives N, N-Dimethylphenylmethanamine. The compounds 'X' and 'Y' are
Oxidation of gluconic acid with nitric acid gives
The carbohydrates are stored in animal body as
The dimensions of \( \frac{B}{E} \) are (B: Magnetic induction, E: Electric field intensity)
Which of the following is not a chiral molecule?
The product obtained on the reaction of propanone with \( CH_3MgBr \) followed by hydrolysis is
The reagent used for the conversion of carboxylic acids to primary alcohols is