List of practice Questions

Assuming that about $20.\,MeV$ of energy is released per fusion reaction ${ }_{1} H ^{2}+{ }_{1} H ^{3} \rightarrow{ }_{0} n^{1}+{ }_{2} He ^{4}$ then the mass of ${ }_{1} H ^{2}$ consumed per day in a fusion reactor of power $1\, MW $ will approximately be
There is a current of $40\, A$ in a wire of $10^{-6} \,m ^{2}$ area of cross-section. If the number of free electrons per cubic metre is $10^{29}$, then the drift velocity is
A machine gun is mounted on a $200 \,kg$ vehicle on a horizontal smooth road (friction negligible). The gun fires $10$ bullets/s with a velocity of $500 \,ms$ lf the mass of each bullet be $10\, g$, what is the acceleration produced in the vehicle?
Three blocks of masses $m_1, m_2$ and $m_3$ kg are placed in contact with each other on a frictionless table. A force $F$ is applied on the heaviest mass $m_1$; the acceleration of $m_3$ will be
Two streams of protons move parallel to each other in the same direction. Then these
A ray of light is incident on the surface of separation of a medium with the velocity oflight at an angle $45^{\circ}$ and is refracted in the medium at an angle $30^{\circ}$. What will be the velocity of light in the medium?
White light may be considered to be a mixture of wave with $\lambda$ ranging between $3000 \,?$ and $7800\,?$. An oil film of thickness $10,000\,?$ is examined normally by the reflected light. If $\mu=1.4$, then the film appears bright for
Which of the following hormone helps in secretion of HCl from stomach?
Which of the following is hermaphrodite ?
Which one of the following is the infective stage of Ascaris lumbricoides?
Which one of the following pairs is obtained on heating ammonium dichromate?
Which of the following expressions gives the de-Broglie relationship?
Which of the following element is responsible for Minamata disease?
Which of the following acids has the smallest dissociation constant?
When $KI$ is added to acidified solution of sodium nitrite, then
What is the structural element of cell wall?
Water vascular system is present in which of the following phylum?
Two identical concentric rings each of mass $m$ and radius $R$ are placed perpendicularly. What is the moment of inertia about axis of one of the rings
The vector of the kala- azar is
The value of $\cos \frac{\pi}{15}\, \cos \frac{2\pi}{15}\, \cos \frac{4\pi}{15}\, \cos \frac{8\pi}{15} $ is
The phenomenon of plasmolysis is evident when cells are kept in
The angle of minimum deviation for a prism is $40^{\circ} $ and the angle of the prism is $60^{\circ} $ . The angle of incidence in this position will be
Surface tension vanishes at
Proximal centriole of the sperm is located in
Poikilotherms are also known as