Quiz

A particle of mass m is projected upwards with velocity  , where  is the escape velocity then at the maximum height the potential energy of the particle is: (R is radius of earth and M is mass of earth)

(a)                        (b)

(c)                      (d)

A particle is projected with velocity  along x-axis. The deceleration on the particle is proportional to the square of the distance from the origin i.e., . The distance at which particle stops is

(a)                            (b)

(c)                     (d)

A conducting circular loop of radius r carries a constant current i. It is placed in a uniform magnetic field  B o which is perpendicular to the plane of the loop. The magnetic force acting on the loop is

(a)                              (b)  

(c) zero                                   (d)

A small conducting sphere of radius r is lying concentrically inside a bigger hollow conducting sphere of radius R. The bigger and smaller spheres are insulated from each other and are charged to Q and q (Q>q) respectively. The potential difference between the sphere will be

(a)          (b)

(c)          (d)

In a thermodynamic process, temperature and volume of one mole of an ideal monatomic gas are varied according to the relation VT = k, where k is a positive constant. In this process, if the temperature of the gas increased by T , then the amount of heat absorbed by gas is [R is the universal gas constant]

(a)                           (b) 

(c)                            (d) 

1. The following reaction

is an example of :

(a) addition reaction    (b) substitution

(c) elimination               (d) rearrangement

Three identical spherical shells, each of mass m and radius r are placed as shown in the figure. Consider an axis XX’ which is touching the two shells and passing through diameter of the third shell. Moment of inertia of the system consisting of these three spherical shells about XX’ axis is:

(a) 

(b)

(c) 

(d) 4

State True (T) or False (F) with respect to the labels and their stated function and select the correct option

A – Mostly monocistronic in prokaryotes

B – It is located towards 5' end, with respect to the polarity of the coding strand.

C – In eukaryotes, this strand is used as template for formation of mRNA.

D – It defines the end of the process of transcription.