List of practice Questions

Three blocks of masses $m , 3\, m$ and $5\, m$ are connected by massless strings and pulled by a force $F$ on a frictionless surface as shown in the figure below. The tension $P$ in the first string is $16\, N$ If the point of application of $F$ is changed as given below The value of $P$ and $Q$ shall be
The transverse displacement of a string fixed at both ends is given by $y=0.06 \sin \left(\frac{2 \pi x}{3}\right) \cos (100 \,\pi t)$ where $x$ and $y$ are in metre and $t$ is in second. The length of the string is $1.5 \,m$ and its mass is $3.0 \times 10^{-2} \,kg$. What is die tension in the string?
The $Ti$ plasmid, is often used for making transgenic plants. The plasmid is found in
The term ??eiosis??was coined by
The tank circuit used in a radio transmitter should have
The tangential force (or) viscous force on any layer of the liquid is directly proportional to velocity gradient $\left(\frac{dv}{dx}\right)$ . Then the direction of velocity gradient is :
The table below shows the comparison of different transport process. Identify the correct comparison
The substance which shows practically no elastic after effect is
The subtangent, ordinate and subnormal to the parabola $y^2= 4ax$ at a point (different from the Origin) are in
The substance which contracts on heating is
The substance used as an activator in froth floatation process is
The structure of the tetrathionate ion is
The structure of C fullerence contain hexagon and pentagon -
The structure of $H_2O_2$ is
The stress-strain graphs for two materials A and B are shown in figure. (Assume same scale)
The statements for laws of chemical combinations are given below. Mark the option which is not correctly matched.
The stage at the end of reproductive phase is
The stage between two meiotic divisions is called interkinesis and
The stability of hydrophobic sol is due to
The spin only magnetic moment of $ {Ni^{2+}}$ (in B.M.) in aqueous solution will be
The sporophytic phase in Funaria is well developed and composed of
The space occupied by b.c.c. arrangement is approximately
The source of nitrogen in Gabriel synthesis of amines is
The solution of nickel sulphate in which nickel rod is dipped is diluted to 10 times. The potential of nickel
The slope of the velocity time graph for retarded motion is