List of top Questions asked in VITEEE

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:
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:
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?
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:
The ratio of momentum of an electron and \( \alpha \)-particle which are accelerated from rest by a potential difference of 100 V is:
Sky wave propagation is used in:
The frequency of an FM transmitter without signal input is:
What is the age of an ancient wooden piece if it is known that the specific activity of \( C \)-nuclide in it is one-third of that in freshly grown trees? Given that the half-life of \( C \)-nuclide is 5700 years:
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:
The force on the charge at the center is:
A solenoid has 2000 turns wound over a length of 0.30 m. The area of its cross-section is \( 1.2 \times 10^{-4} \, \text{m}^2 \). Around its central section, a coil of 300 turns is wound. If an initial current of 2 A in the solenoid is reversed in 0.25 s, then the emf induced in the coil is:
An inductive circuit contains a resistance of 100 \( \Omega \) and an inductance of 0.2 H. If an AC voltage of 120 V and frequency of 60 Hz is applied to this circuit, the current in the circuit would be nearly:
In a Millikan’s oil drop experiment, the charge on an oil drop is calculated to be \( 6.35 \times 10^{-19} \, \text{C} \). The number of excess electrons on the drop is:
The values \( +\frac{1}{2} \) and \( -\frac{1}{2} \) of spin quantum number show:
The frequency of incident light falling on a photosensitive metal plate is doubled, the kinetic energy of the emitted photoelectrons is:
Light of two different frequencies whose photons have energies 1 eV and 2.5 eV, respectively, successively illuminate a metal whose work function is 0.5 eV. The ratio of the maximum speed of the emitted electrons will be:
An electric bulb of 100 W is connected to a supply of electricity of 220 V. The resistance of the filament is:
Pick out the wrong statement:
The electrochemical equivalent of magnesium is 0.126 mg/C. A current of 5 A is passed in a suitable solution for 1 hour. The mass of magnesium deposited will be:
In producing chlorine through electrolysis, 100 W power at 125 V is being consumed. How much chlorine per minute is liberated? (ECE of chlorine is \( 0.367 \times 10^{-6} \, \text{kg/C} \))
A particle carrying a charge 100 times the charge on an electron is rotating per second in a circular path of radius 0.8 m. The value of the magnetic field produced at the center will be: