List of top Questions asked in VITEEE- 2010

Light of wavelength \(\lambda\) strikes a photo-sensitive surface and electrons are ejected with kinetic energy \(E\). If the kinetic energy is to be increased to \(2E\), the wavelength must be changed to \(\lambda'\) where
The maximum velocity of electrons emitted from a metal surface is \(v\), when frequency of light falling on it is \(f\). The maximum velocity when frequency becomes \(4f\) is
The photoelectric plate is kept vertically above the emitter plate. Light source is put on and a saturation photo-current is recorded. An electric field is switched on which has a vertically downward direction, then
A cylindrical conductor of radius \(R\) carries a current \(I\). The value of magnetic field at a point which is \(\dfrac{R}{4}\) distance inside from the surface is \(10\,T\). The value of magnetic field at a point which is \(4R\) distance outside the surface is
Figure shows a straight wire length \(l\) carrying current \(i\). The magnitude of magnetic field produced by the wire at point \(P\) is
Zener diode is used for
Two light sources are said to be coherent if they are obtained from
A small coil is introduced between the poles of an electromagnet so that its axis coincides with the magnetic field direction. The number of turns is \(n\) and the cross-sectional area of the coil is \(A\). When the coil turns through \(180^\circ\) about its diameter, the charge flowing through the coil is \(Q\). The total resistance of the circuit is \(R\). What is the magnitude of the magnetic induction?
The attenuation of a calf fibre is mainly due to
An arc of radius \(r\) carries charge. The linear density of charge is \(\lambda\) and the arc subtends an angle \(\dfrac{\pi}{3}\) at the centre. What is electric potential at the centre?
In Young's double slit experiment, the spacing between the slits is \(d\) and wavelength of light used is \(6000\,\text{\AA}\). If the angular width of a fringe formed on a distance screen is \(1^\circ\), the value of \(d\) is
An electric dipole consists of two opposite charges of magnitude \(q = 1\times 10^{-6}\,C\) separated by \(2.0\,cm\). The dipole is placed in an external field of \(2\times 10^{5}\,NC^{-1}\). What maximum torque does the field exert on the dipole? How much work must an external agent do to turn the dipole end to end, starting from position of alignment (\(\theta = 0^\circ\))?
The electron of hydrogen atom is considered to be revolving round a proton in circular orbit of radius \(h^2/me^2\) with velocity \(e^2/h\), where \(h = h/2\pi\). The current \(i\) is
Which of the following rays is emitted by a human body?
A proton of mass \(1.67\times 10^{-27}\,kg\) enters a uniform magnetic field of \(1\,T\) at point \(A\) shown in figure with a speed of \(10^{7}\,m\,s^{-1}\). The magnetic field is directed perpendicular to the plane of the paper downwards. If the proton emerges out of the magnetic field at point \(C\), then the distance \(AC\) and the value of angle \(\theta\) will respectively be
A neutral water molecule (\(H_2O\)) in its vapour state has an electric dipole moment of magnitude \(6.4\times 10^{-30}\,C\,m\). How far apart are the molecules centres of positive and negative charges?
A straight wire carrying current \( i \) is turned into a circular loop. If the magnitude of magnetic moment associated with it in MKS unit is \( M \), the length of wire will be
The ratio of the amounts of heat developed in the four arms of a balance Wheatstone bridge, when the arms have resistances \(P = 100\,\Omega\), \(Q = 10\,\Omega\), \(R = 300\,\Omega\) and \(S = 30\,\Omega\) respectively is
An electric kettle takes \(4\,A\) at \(220\,V\). How much time will it take to boil \(1\,kg\) of water from temperature \(20^\circ C\)? The temperature of boiling water is \(100^\circ C\).
Magnetic field at the centre of a circular loop of area is \(B\). The magnetic moment of the loop will be
For the reaction, $2 A(g)+B_{2}(g) \rightleftharpoons 2 A B_{2}(g)$ the equilibrium constant, $K_{p}$ at $300\, K$ is $16.0$. The value of $K_{p}$ for $A B_{2}(g) \rightleftharpoons A(g)+1 / 2 B_{2}(g)$ is
For which one of the following reactions will there be a positive $\Delta S$ ?
Which of the following is a Gattermann aldehyde synthesis?
A proton of mass $ 1.67 \times 10^{-27}\, kg$ enters a uniform magnetic field $1\, T$ of at point A shown in figure with a speed of $10^7\, ms^{-1}$ The magnetic field is directed normal to the plane of paper downwards. The proton emerges out of the magnetic field at point $C$, then the distance $AC$ and the value of angle $\theta $ will respectively be
Most crystals show good cleavage because their atoms, ions or molecules are