List of top Questions asked in BITSAT

A material particle with a rest mass m₀ is moving with a velocity of light c. Then the wavelength of the de Broglie wave associated with it is
A transistor has a base current of 1mA and emitter current 90mA. The collector current will be
Which of the following is best nuclear fuel
Two solenoids of same cross-sectional area have their lengths and number of turns in ratio of 1:2. The ratio of self-inductance of two solenoids is
An alternating voltage V=V₀ω t is applied across a circuit. As a result, a current I=I₀(ω t-π/2) flows in it. The power consumed per cycle is
A resistance R and inductance L and a capacitor C are connected in series with an AC supply. The resistance of R is 16Ω, inductive reactance =24Ω and capacitive reactance =12Ω. If the current in the circuit is 5A, find the potential difference across R, L and C.
The diameter of the objective of a telescope is a, its magnifying power is m and wavelength of light is λ. The resolving power of the telescope is
The photoelectric threshold of a metal is 2000. The energy of electrons ejected from the surface by ultraviolet light of wavelength 1500 is
The back emf induced in a coil, when current changes from 1 ampere to zero in one milli-second, is 4 volts. The self inductance of the coil is
Which of the following quantities does not change when a resistor connected to a battery is heated due to the current?
In a region, the potential is represented by V(x,y,z)=6x-8xy-8y+6yz, where V is in volts and x,y,z are in metres. The electric force experienced by a charge of 2 coulomb situated at point (1,1,1) is:
Two metallic spheres of radii 1 cm and 3 cm are given charges of -1×10⁻²C and 5×10⁻²C respectively. If these are connected by a conducting wire, the final charge on the bigger sphere is
A source has wavelength 60 cm when it is stationary. If the speed of sound in air is 320m s⁻¹ and the source moves with speed 20m s⁻¹, the wavelength in the forward direction will be
A charge +q is at a distance L/2 above a square of side L. Then what is the flux linked with the surface?
A simple pendulum has time period T. Its time period in a lift which is moving upwards with acceleration 3m s⁻² is
One kilogram of ice at 0C is mixed with one kilogram of water at 80C. The final temperature of the mixture is (Take specific heat of water = 4200J kg⁻¹K⁻¹, Latent heat of ice = 336kJ kg⁻¹)
3 moles of an ideal gas at temperature 27C are mixed with 2 moles of an ideal gas at temperature 227C. Determine the equilibrium temperature of the mixture, assuming no loss of energy.
An ideal refrigerator has a freezer at a temperature of 130C. The coefficient of performance of the engine is 5. The temperature of the air (to which heat is rejected) is
In the equation PV^γ=constant, the value of γ is unity. Then the process is
A wave y=a(ω t-kx) on a string meets with another wave producing a node at x=0. Then the equation of the unknown wave is
Two mercury drops (each of radius r) merge to form a bigger drop. The surface energy of the bigger drop, if the surface tension is T, is
Two circular plates of radius 5 cm each have a 0.01 mm thick water film between them. What will be the force required to separate these plates? (Surface tension 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
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 vA/vB is
The upper end of a wire of diameter 12 mm and length 1 m is clamped and its other end is twisted through an angle of 30^. The angle of shear is