List of top Questions asked in VITEEE

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:

Sky wave propagation is used in:

The frequency of an FM transmitter without signal input is:

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:

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:

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:

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:

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:

A rectangular loop carrying a current \( i \) is placed in a uniform magnetic field \( B \). The area enclosed by the loop is \( A \). If there are \( n \) turns in the loop, the torque acting on the loop is given by:

In a magnetic field of 0.05 T, area of a coil changes from \( 10 \, \text{cm}^2 \) to \( 100 \, \text{cm}^2 \) without changing the resistance which is 2 \( \Omega \). The amount of charge that flows during this period is:

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 \( 0.367 \times 10^{-6} \, \text{kg/C} \))

Dimensions of a block are \( 1 \, \text{cm} \times 1 \, \text{cm} \times 100 \, \text{cm} \). If the specific resistance of its material is \( 3 \times 10^{-7} \, \Omega \, \text{m} \), then the resistance between the opposite rectangular faces is:

The magnitude and direction of the current in the circuit shown will be:

A glass rod rubbed with silk is used to charge a gold leaf electroscope, and the leaves are observed to diverge. The electroscope is then charged with X-rays for a short period. Then the leaves will:

An infinite line charge, with coordinates \( x = 1 \) cm and charge density \( \lambda \), produces an electric field at point A at distance r from the line. If the charge on line is \( 10 \mu C \), then what is the electric field at point A?

A cube of side 5 cm is placed in a uniform field \( E \), where \( E = 5 \times 10^4 \, \text{N/C} \). The flux through the cube is:

The capacity of a capacitor is \( 4 \times 10^{-6} \, \text{F} \) and its potential is 100 V. The charge on the plates is:

Which of the following will give Cannizzaro reaction?