List of practice Questions

A particle is thrown vertically upwards. Its velocity at half of the height is $ 10\, ms^{ - 1} $ . Then the maximum height attained by it is (Take $g = 10\,ms^{ -2} $ )
Barrier potential of $a p-n$ junction diode does not depend on
A man weighs $80\, kg$. He stands on a weighing scale in a lift which is moving upwards with a uniform acceleration of $5 \,ms^{-2}$ What would be the reading on the scale? ($g = 10\, ms^{-2})$
An observer moves towards a stationary source of sound with a speed $1 / 5\, th$ of the speed of sound. The wavelength and frequency of the source emitted are $\lambda$ and $f$ respectively. The apparent frequency and wavelength recorded by the observer are respectively
The kinetic energy of $1 \,g$ molecule of a gas, at normal temperature and pressure is $( R = 8.31 \,J \, mol^{-1} \, K^{-1} )$
Consider a compound slab consisting of two different materials having equal thickness and thermal conductivities $K$ and $2K$ respectively. The equivalent thermal conductivity of the slab is
A ball rolls without slipping. The radius of gyration of the ball about an axis passing through its center of mass is $K$. If radius of the ball be $R,$ then the fraction of total energy associated with its rotational energy will be
When a car moves on a road with uniform speed of $30\,km /h$, then the net resultant force on the car is
A ball is projected horizontally with a velocity of $4\,m s^{-1}$ from the top of a tower. The velocity of the ball after 0.7 s is (Take g = 10 $m s^{-2}$)
The mass of proton is 1.0073 u and that of neutron is 1.0087 u (u = atomic mass unit). The binding energy of $^{4}_{2}He$ is Given, mass of helium nucleus $\approx4.0015 u.$
Effect of pollution is observed first on
Which of the following is a protein hormone ?
Which of the following is the most productive ecosystem ?
Which of the following phenomenon exhibits particle's nature of light ?
Which structure is not characteristic of mushrooms ?
Xenogamy is
Which of the following carbohydrates is absent in honey ?
Which enzyme is used in transcription ?
Two strands of double helix model of DNA are held together by H-bonds between
The tunica corpus theory was proposed by :
The proteinaceous infectious particles that cause infectious diseases are called
The process of reverse transcription was discovered by
Sucrose is an example of
Sponges are most commonly
New approach to conservation is establishment of