List of top Physics Questions asked in BITSAT

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
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.
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
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 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
A charge +q is at a distance L/2 above a square of side L. Then what is the flux linked with the surface?
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
Which of the following quantities does not change when a resistor connected to a battery is heated due to the current?
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
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.
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
A simple pendulum has time period T. Its time period in a lift which is moving upwards with acceleration 3m s⁻² is
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 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
A spring is compressed between two toy carts of mass m₁ and m₂. When the toys are released, the springs exert equal and opposite average forces for the same time on each cart. If v₁ and v₂ are the velocities of the toy carts and there is no friction between the toy carts and the ground, then:
The potential energy for a force field is given by U(x,y) = (x+y). The force acting on a particle at position given by coordinates (0, π/4) is:
The ratio of the accelerations for a solid sphere (mass m and radius R) rolling down an incline of angle θ without slipping and slipping down the incline without rolling is
Two projectiles A and B are thrown with the same speed but at angles 40^ and 50^ with the horizontal. Then
A body is travelling in a circle at a constant speed. It
The position x of a particle varies with time t as x = At² - Bt³. The acceleration at the time of the maximum velocity will be equal to zero. What is the value of t?
If P represents radiation pressure, c represents speed of light and Q represents radiation energy striking a unit area per second, the non-zero integers x, y and z such that Pˣ Qʸ cᶻ is dimensionless, are: