List of practice Questions

The color code of a resistance is given below : The values of resistance and tolerance, respectively, are :

The correct option for free expansion of an ideal gas under adiabatic condition is :

The energy required to break one bond in DNA is $10^{-20}J $. This value in eV is nearly

The increase in the width of the depletion region in a p-n junction diode is due to :

The mean free path for a gas, with molecular diameter $d$ and number density $n$ can be expressed as :

The number of protons, neutrons and electrons in $^{175}_{71} Lu,$ respectively , are :

The ratio of contributions made by the electric field and magnetic field components to the intensity of an electromagnetic wave is : (c = speed of electromagnetic waves)

The solids which have negative temperature coefficient of resistance are :

Three identical spheres, each of mass $M$, are placed at the corners of a right angle triangle with mutually perpendicular sides equal to $2\,m$ (see figure). Taking the point of intersection of the two mutually perpendicular sides as the origin, find the position vector of centre of mass

Two bodies of mass $4\,kg$ and $6\,kg$ are tied to the ends of a massless string. The string passes over a pulley which is frictionless (see figure). The acceleration of the system in terms of acceleration due to gravity (g) is :

Two coherent sources of light interfere and produce fringe pattern on a screen. For central maximum, the phase difference between the two waves will be

Two particles of mass $5\,kg$ and $10\,kg$ respectively are attached to the two ends of a rigid rod of length 1m with negligible mass. The centre of mass of the system from the $5\,kg$ particle is nearly at a distance of :

When a uranium isotope $^{235}_92 U$ is bombarded with a neutron, it generates $^{89}_{36} Kr$, three neutrons and :

Which of the following graph represents the variation of resistivity $(\rho)$ with temperature (T) for copper ?

Identify the wrong statement with reference to the gene T that controls ABO blood groups.

In which of the following techniques, the embryos are transferred to assist those females who cannot conceive?

Match the following columns and select the correct option.

Select the correct match

The infectious stage of Plasmodium that enters the human body is

The process of growth is maximum during :

The roots that originate from the base of the stem are:

Which of the following is not an attribute of a population ?

If \(log_45=(log_4y)(log_6\sqrt5)\),then \(y\) equals

The trace of a square matrix is defined to be the sum of its diagonal entries. If $A$ is a $2 \times 2$ matrix such that the trace of $A$ is $3$ and the trace of $A^{3}$ is $-18$, then the value of the determinant of $A$ is ______

A student observes grass and Hibiscus plants in his garden during noon. To his surprise, only the leaves of grass were found rolled inwards. The reason could be