List of practice Questions

Which of the following statements(s) is (are) correct?
During paddling of a bicycle, the force of friction exerted by the ground on the two wheels is such that it acts
Two bodies A and B have thermal emissivities of 0.01 and 0.81 respectively. The outer surface areas of the two bodies are the same. The two bodies emit total radiant power at the same rate. The wavelength $\lambda_B$ corresponding to maximum spectral radiancy in the radiation from B shifted from _the wavelength corresponding to maximum spectral radiancy in the radiation from A, by 1.00 pm. If the temperature of A is 5802 K.
A particle of mass $m$ is moving in a circular path of constant radius $r$ such that centripetal acceleration $a_{c}$ varying with time is $a_{c}=k^{2}\, r \,t^{2}$ where $k$ is a constant. What is the power delivered to the particle by the force acting on it?
Centromere is required for
The metal always found in free state is
Synthetic human hairwigs are made from a copolymer of vinyl chloride and acrylonitrile, and is called
The pyramid which cannot be inverted in a stable ecosystem is that of
A sphere collides with another sphere of identical mass. After collision, the two spheres move. The collision is inelastic. Then the angle between the directions of two spheres is
A hollow metallic cylinder is heated. Then its internal diameter
At what height over the earth's pole, the free fall acceleration decreases by $1%$. (Assume the radius of earth to be $6400 km$)
Which of the following is the function of enterogastrone?
If the gravitational force between two objects were proportional to $ 1/R $ (and not as $ 1/R^2 $ ), where R is the distance between them, then a particle in a circular path (under such a force) would have its orbital speed v, proportional to
A solid spherical ball rolls on a table. Ratio of its rotational kinetic energy to total kinetic energy is
A satellite in force free space sweeps stationary interplanetary dust at a rate of $ dM/dt = \alpha v $ , where M is mass and v is the speed of satellite and $\alpha$ is a constant. The acceleration of satellite is
Out of 38 ATP molecules produced per glucose, 32 ATP molecules are formed from NADH/FADH in
The process of translation is
If N is the number of turns in a coil, the value of self inductance varies as
A satellite A of mass m is at a distance of r from the surface of the earth. Another satellite B of mass 2m is at a distance of 2r from the earth's centre. Their time periods are in the ratio of
The product of addition polymerization reaction is
Three resistances each of $4\, \Omega$ are connected to form a triangle. The resistance between any two terminals is
Which electronic configuration of an element has abnormally high difference between second and third ionisation energy?
Among the following which compound will show the highest lattice energy?
During DNA replication, the strands separate by
Pteridophytes differ from bryophytes and thallophytes in having