List of top Questions asked in BITSAT- 2011

In a semiconductor diode, the barrier potential offers opposition to:
The output of an OR gate is connected to both inputs of a NAND gate. The combination serves as:
Which one is correct about fission?
An electron in a hydrogen-like atom is in an excited state. It has total energy of -3.4 eV. The kinetic energy and de-Broglie wavelength respectively are:
If the energy of a photon is 10 eV, its momentum is:
If the distance between first maxima and fifth minima of a double slit pattern is 7 mm and the slits are separated by 0.15 mm with the screen 50 cm away, the wavelength of light used is:
The energies of energy levels A, B and C are EA < EB < EC. If the radiations of wavelengths ₁, ₂, ₃ are emitted due to transitions C to B, B to A and C to A respectively, then which relation is correct?
An electromagnetic wave passes through space and its equation is given by E = E₀ sin(ω t - kx). The energy density of the electromagnetic wave in space is:
A thin convergent glass lens (= 1.5) has a power of +5.0 D. When this lens is immersed in a liquid of refractive index μ, it acts as a divergent lens of focal length 100 cm. The value of μ must be:
A vessel of depth d is half-filled with a liquid of refractive index ₁ and the upper half with a liquid of refractive index ₂. The apparent depth of the vessel seen perpendicularly is:
A metal rod of length 1 m is rotated about one of its ends in a plane perpendicular to a magnetic field of induction 2.5 × 10⁻³Wb/m². If it makes 1800 revolutions per minute, calculate the emf induced between its ends.
If M is the magnetic moment and B is the magnetic field, the torque acting on the magnetic dipole is given by:
A hollow metal sphere of radius 5 cm is charged such that the potential at its surface is 10 V. The potential at a distance of 2 cm from the centre of the sphere is:
If the potential of a capacitor of capacity 6 μF is increased from 10 V to 20 V, the increase in its energy will be:
A charge Q₁ exerts some force on a second charge Q₂. If a third charge Q₃ is brought near, then the force exerted on Q₂ will:
The fundamental frequency of an open organ pipe is 300 Hz. The first overtone of this pipe has the same frequency as the first overtone of a closed organ pipe. If the speed of sound is 330 m/s, then the length of the closed organ pipe is:
An air bubble of volume v₀ is released by a fish at depth h in a lake. The volume of bubble just before reaching the surface will be:
Which of the following expressions corresponds to simple harmonic motion along a straight line, where x is displacement and a,b,c are positive constants?
The molecules of a gas have rms velocity 200 m/s at 27°C. Find rms velocity at 127°C if pressure is constant.
A geo-stationary satellite is one which:
A copper sphere cools from 62°C to 50°C in 10 minutes and to 42°C in next 10 minutes. Calculate the temperature of surroundings.
Two wires of same material and same volume have cross-sectional areas A and 2A. If the first wire is elongated by Δ x under force F, the force required to stretch the second wire by the same amount is:
An iron rod of length 2 m and cross-sectional area 50 mm² is stretched by 0.5 mm by hanging a mass of 250 kg. The Young’s modulus of iron is:
Viscosity is the property of a liquid due to which it:
The radiation emitted by a perfectly black body is proportional to: