List of practice Questions

Who is the ??ather of endocrinology??
Two identical straight wires are stretched so as to produce $6$ beats per second when vibrating simultaneously. On changing the tension slightly in one of them, the beat frequency still remains unchanged. Denoting by $T_{1}$ and $T_{2},$ the higher and the lower initial tensions in the strings, it could be said that while making the above changes in tension:
Which of the following are correct for axolotl larva? (i) it shows neoteny and paedogenesis (ii) absence of thyroxine affect metamorphosis (iii) it is die larva of hemichordata
Two ships $A$ and $B$ are sailing straight away from a fixed point $O$ along routes such that $?\,AOB$ is always $120^{\circ}$. At a certain instance, $OA = 8\, km, OB = 6\, km$ and the ship $A$ is sailing at the rate of $20 km/hr$ while the ship $B$ sailing at the rate of $30 km/hr$. Then the distance between $A$ and $B$ is changing at the rate (in km/hr) :
Two point charges $ +8q$ and $-2q$ are placed as shown in the figure.
The point where the electric field is zero is
Two capacitors, $ 3\,\mu F $ and $ 4\,\mu F $ , are individually charged across a $6\,V$ battery. After being disconnected from the battery, they are connected together with the negative plate of one attached to the positive plate of the other. What is the final total energy stored
Two blocks of masses $2.9\, kg$ and $1.9 \,kg$ are suspended from a rigid support $S$ by two inextensible wires each of length $1 \,m$ (figure). The upper wire has negligible mass and the lower wire has a uniform mass of $0.2\, kg/m$. The whole system of blocks, wires and support have an upward accelration of $ 0.2\,m/s^{2} $ . The tension at the mid-point of the upper wire is
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