List of top Questions asked in JEE Advanced- 1989

An astronomical telescope has an angular magnification of magnitude 5 for far objects. The separation between the objective and the eyepiece is 36 cm and the final image is formed at infinity. The focal length $f_o$ of the objective and the focal length $f_e$ of the eyepiece are

A conducting square loop of side L and resistance R moves in its plane with a uniform velocity v perpendicular to one of its sides. A magnetic induction B, constant in time and space, pointing perpendicular to and into the plane of the loop exists everywhere.The current induced in the loop is

Nitrogen (I) oxide is produced by

The ground state electronic configuration of chromium is

Which one of the following is the smallest in size?

Two identical p-n junctions may be connected in series with a battery in three ways . The potential drops across the two p-n junctions are equal in

The molecule which has pyramidal shape is

Imagine a light planet revolving around a very massive star in a circular orbit of radius R with a period of revolution T. If the gravitational force of attraction between the planet and the star is proportional to $ R^{-5/2} $ , then

For an ideal gas

The lines $2x - 3y = 5$ and $3x - 4y = 7$ are diameters of a circle of area 154 sq unitis. Then, the equation of this circle is

I f F and F are independent events such that $O < P(E) < 1$ and $O < P (F ) < 1$, then

A five digit number divisible by $3$ is to be formed by using the numerals $0$, $1$, $2$, $3$, $4$ and $5$ without repetition. The total number of ways in which can be done is