List of top Questions asked in BITSAT- 2021

A cyclic process ABCD is shown in the figure P-V diagram. Which of the following curves represent the same process?

A mercury drop of radius 1 cm is sprayed into 10⁶ drops of equal size. The energy expressed in joules is (surface tension of mercury is 460 × 10⁻3N/m):

What is the minimum energy required to launch a satellite of mass m from the surface of a planet of mass M and radius R in a circular orbit at an altitude of 2R?

A wire is connected to a battery between the points M and N as shown in figure
(1). The same wire is bent in the form of a square and then connected to the battery between the points M and N as shown in figure
(2). Which of the following quantities increases?

A tuning fork of frequency 392Hz resonates with 50cm length of a string under tension T. If the length of the string is decreased by 2%, keeping the tension constant, the number of beats heard when the string and the tuning fork are made to vibrate simultaneously is

A thin but rigid semicircular wire frame of radius r is hinged at O and can rotate in its own vertical plane. A smooth peg P starts from O and moves horizontally with constant speed v₀, lifting the frame upward as shown in the figure. Find the angular velocity ω of the frame when its diameter makes an angle of 60^∘ with the vertical.

A long, hollow conducting cylinder is kept coaxially inside another hollow conducting cylinder of larger radius. Both the cylinders are initially electrically neutral.

A body moves in a circular orbit of radius R under the action of a central force. Potential due to the central force is given by V(r)=kr (where k is a positive constant). Period of revolution of the body is proportional to

During vapourisation I. change of state from liquid to vapour state occurs. II. temperature remains constant. III. both liquid and vapour states coexist in equilibrium. IV. specific heat of substance increases. Correct statements are

A telescope has an objective lens of 10cm diameter and is situated at a distance of one kilometer from two objects. The minimum distance between these two objects, which can be resolved by the telescope, when the mean wavelength of light is 5000AA, is of the order of

Five gas molecules chosen at random are found to have speeds of 500, 600, 700, 800 and 900m/s.

There are two sources kept at distances 2λ apart. A large screen is perpendicular to the line joining the sources. Number of maxima on the screen in this case (λ= wavelength of light) is

Two concentric conducting spherical shells A and B having radii rA and rB (rB > rA) are charged to QA and -QB (|QB| > |QA|). The electric field along a line passing through the centre is

Two plano-convex lenses (1 and 2) of glass of refractive index 1.5 have radii of curvature 25cm and 20cm. They are placed in contact with their curved surfaces towards each other and the space between them is filled with liquid of refractive index 4/3. The combination is:

A meter bridge is set up as shown, to determine an unknown resistance X using a standard 10Ω resistance. The balance point is obtained when tapping key is at 52cm mark. The end corrections are 1cm and 2cm respectively for the ends A and B. The determined value of X is

A disk of radius a/4 having a uniformly distributed charge -6C is placed in the x-y plane with its centre at (-a/2,0,0). A rod of length a carrying a uniformly distributed charge 8C is placed on the x-axis from x = a/4 to x = 5a/4. Two point charges -7C and 3C are placed at (-a/4,0,0) and (-3a/4,3a/4,0), respectively. Consider a cubical surface formed by six surfaces x=± a/2, y=± a/2, z=± a/2. The electric flux through this cubical surface is

On a hypotenuse of a right prism (30^∘-60^∘-90^∘) of refractive index 1.50, a drop of liquid is placed as shown in figure. Light is allowed to fall normally on the short face of the prism. In order that the ray of light may get totally reflected, the maximum value of refractive index of the liquid is

The following figure depicts a circular motion. The radius of the circle, the period of revolution, the initial position and the sense of revolution are indicated on the figure. The simple harmonic motion of the x-projection of the radius vector of the rotating particle P can be shown as:

In the circuit shown in figure, the current through the given resistor is

Two conducting shells of radius a and b are connected by a conducting wire as shown in figure. The capacity of system is:

One mole of an ideal gas is taken from state A to state B by three different processes, (i) ACB (ii) ADB (iii) AEB as shown in the P-V diagram. The heat absorbed by the gas is