List of top Physics Questions asked in BITSAT

An ideal refrigerator has a freezer at a temperature of $-13^{\circ} C$. The coefficient of performance of the engine is $5$. The temperature of the air (to which heat is rejected) is
Two planets $A$ and $B$ have the same material density. If the radius of $A$ is twice that of $B$, then the ratio of the escape velocity $V_{A} / V_{B}$ is
Two circular plates of radius $5\, cm$ each, have a $0.01\, mm$ thick water film between them. Then what will be the force required to separate these plate (S.T. of water = $73$ dyne/cm) ?
Suppose the gravitational force varies inversely as the nth power of distance. Then the time period of a planet in circular orbit of radius $R$ around the sun will be proportional to
The power dissipated in the circuit shown in the figure is $30$ Watts. The value of $R$ is
A point charge $+q$ is placed at the centre of a cube of side $L$. The electric flux emerging from the cube is

A cyclic process is shown in the p-T diagram. Which of the curves shows the same process on a p-V diagram? 



Which of the following is most accurate?
A projectile projected at an angle 30^ from the horizontal has a range R. If the angle of projection at the same initial velocity is 60^, the range will be:
A block of mass M is pulled along a horizontal frictionless surface by a rope of mass M/2. If a force 2Mg is applied at one end of the rope, the force which the rope exerts on the block is:
A chain of mass M is placed on a smooth table with 1/n of its length hanging over the edge. The work done in pulling the hanging portion of the chain back to the surface of the table is:
A particle of mass 10 kg moving eastwards with a speed 5 m s⁻¹ collides with another particle of same mass moving northwards with the same speed. The two particles coalesce on collision. The new particle of mass 20 kg will move in the north-east direction with velocity:
A particle starts moving rectilinearly at time t=0 such that its velocity v changes with time t according to the equation v=t²-t, where t is in seconds and v is in m/s. Find the time interval for which the particle retards.
A sample of gas expands from volume V₁ to V₂. The amount of work done by the gas is greatest when the expansion is:

Which one of the following graphs represents the behaviour of an ideal gas? 

Calculate the area of the plates of a one farad parallel plate capacitor if separation between plates is 1 mm and plates are in vacuum
The length of a potentiometer wire is . A cell of emf E is balanced at a length /3 from the positive end of the wire. If the length of the wire is increased by /2. At what distance will the same cell give a balance point?
A constant current i flows in a loop of radius r. It is placed in a uniform magnetic field B₀ such that B₀ is perpendicular to the plane of the loop. The magnetic force acting on the loop is
An ammeter reads upto 1 ampere. Its internal resistance is 0.81 ohm. To increase the range to 10 A the value of required shunt is
At the magnetic north pole of the earth, the value of horizontal component of earth’s magnetic field and angle of dip are, respectively
Lenz’s law is a consequence of the law of conservation of
The magnetic field in a travelling electromagnetic wave has a peak value of 20 nT. The peak value of electric field strength is
When a mica sheet of thickness 7 microns and μ=1.6 is placed in the path of one of interfering beams in a biprism experiment then the central fringe gets at the position of seventh bright fringe. The wavelength of light used will be
In Young's double slit experiment, if the slit widths are in the ratio 1:2, the ratio of the intensities at maxima will be
In a photoelectric experiment, with light of wavelength λ, the fastest electron has speed v. If the exciting wavelength is changed to 3λ/4, the speed of the fastest emitted electron will become