List of top Questions asked in VITEEE- 2011

The product formed when phthalimide is treated with a mixture of \( \text{Br}_2 \) and strong NaOH solution is:

An alkene having molecular formula \( C_8H_{12} \) on ozonolysis yields glyoxal and 2, 2-dimethyl butane-1, 4-dial. The structure of the alkene is:

In a set of reactions acetic acid yielded a product D:

A nucleus \( _{Z}^A X \) emits an \( \alpha \)-particle. The resultant nucleus emits a \( \beta^- \)-particle. The respective atomic and mass numbers of the final nucleus will be:

\( p \)-toluidine and benzyl amine can be distinguished by:

Polarising angle for water is \( 53^\circ 4' \). If light is incident at this angle on the surface of water and reflected, the angle of refraction is:

A coil of resistance 100 \( \Omega \) and inductance 5 H is connected to a 100 V battery. Then the energy stored in the coil is:

An ammeter reads up to 1 A. Its internal resistance is 0.81 \( \Omega \). To increase the range to 10 A, the value of the required shunt is:

A 2 V battery, a 15 \( \Omega \) resistor, and a potentiometer of 100 cm length are connected in series. If the resistance of potentiometer wire is 5 \( \Omega \), then the potential gradient of the potentiometer wire is:

The output voltage of a transformer connected to a 220 V line is 1100 V at 2 A current. Its efficiency is 100%. The current coming from the line is:

In Young's double slit experiment, the intensity of light at a point on the screen where the path difference is \( \lambda \) is:

A nucleus \( _{Z}^A X \) emits an \( \alpha \)-particle. The resultant nucleus emits a \( \beta^- \)-particle. The respective atomic and mass numbers of final nucleus will be:

The insulation property of air breaks down at \( 3 \times 10^6 \, \text{V/m} \). The maximum charge that can be given to a sphere of diameter 5 m is nearly:

Five resistances are connected as shown in the figure. The effective resistance between points A and B is:

A potentiometer is connected across A and B, and a balance is obtained at 64.0 cm. When potentiometer lead to B is moved to C, a balance is found at 8.0 cm. If the potentiometer is now connected across B and C, a balance will be found at:

As shown in the figure, charges \( +q \) and \( -q \) are placed at the vertices B and C of an isosceles triangle. The potential at the vertex A is:

On moving a charge of \( 20 \, \text{C} \) by \( 2 \, \text{cm} \), 2 J of work is done, then the potential difference between the points is:

In an electromagnetic wave, the average energy density associated with magnetic field is:

An electromagnetic wave going through vacuum is described by: \[ E = E_0 \sin(kx - \omega t) \] Which of the following is/are independent of the wavelength?

The force on the charge at the center is:

The ratio of momentum of an electron and \( \alpha \)-particle which are accelerated from rest by a potential difference of 100 V is:

The frequency of an FM transmitter without signal input is:

An electron accelerated under a potential difference \( V \) volt has a certain wavelength \( \lambda \). Mass of proton is some 2000 times the mass of the electron. If the proton has to have the same wavelength \( \lambda \), then it will have to be accelerated under a potential difference of:

A thin metallic spherical shell contains a charge \( Q \). A point charge \( q \) is placed at the center of the shell and another charge \( q_1 \) is placed outside it as shown in the figure. All the three charges are positive. The force on the charge at the center is:

Sky wave propagation is used in: