List of practice Questions

A wave equation is given as \(y=20sin (20x)cos(1000t)\) What will be the speed of stationary wave:
If the same charge 'q' is placed inside a sphere and cube having radius 1 m and side 2 m respectively. What will be the ratio of the flux passing through them:
Find the amount of charge flown from Y to X when switch S is closed.

Psychrometer is used to measure
Haemoglobin and gold sol are examples of :
What would be the molality of $20\%$ (mass / mass) aqueous solution of $KI$? (molar mass of $KI = 166\, g\, mol^{-1}$)
Bicarpellary ovary with obliquely placed septum is seen in :-
Which one of the following statements regarding post-fertilization development in flowering plants is incorrect ?
The given figure shows transport of two molecules $A$ and $B$ through three different modes of facilitated diffusion. Select the correct option regarding it.
Respiratory Quotient (RQ) value of tripalmitin is -
In the dicot root the vascular cambium originates from :-
Following table summarises the comparisons between phyllodades and cladodes (cladophylls). Pick up the wrong differences and select the correct option,
What type of pollination takes place in Vallisneria?
Which of the following ecological pyramids is generally inverted ?
In pteridophytes, main plant body is a , which is into true roots, stem and leaves. Fill the blanks in above statement and select the correct option.
The complex that has highest crystal feild splitting energy $(\Delta )$, is :
The number of sigma ($\sigma$)and pi ($\pi$) bonds in pent-2-en-4-yne is :
The pair that does NOT require calcination is:
Hall-Heroult's process is given by :
NaH is an example of :
The compound that inhibits the growth of tumors is :
The correct structure of tribromooctaoxide is
Two similar thin $equi-convex$ lenses, of focal length $f$ each, are kept coaxially in contact with each other such that the focal length of the combination is $F_1$. When the space between the two lenses is filled with glycerin (which has the same refractive index $(p = 1.5)$ as that of glass) then the equivalent focal length is $F_2$. The ratio $F_1$ : $F_2$ will be :
Two very long, straight, and insulated wires are kept at $90^{\circ}$ angle from each other in $xy$ - plane as shown in the figure. These wires carry currents of equal magnitude $I$, whose directions are shown in the figure. The net magnetic field at point $P$ will be :
A thermometer graduated according to a linear scale reads a value $x_0$ when in contact with boiling water, and $x_0/3$ when in contact with ice. What is the temperature of an object in $0 {^{\circ}C}$, if this thermometer in the contact with the object reads $x_0/2$ ?