List of top Physics Questions asked in VITEEE

A solenoid has $2000$ turns wound over a length of $0.30\, m$ . The area of its cross-section is $1.2 ? 10^{-3}\, m^2$. Around its central section, a coil of $300$ turn is wound. If an initial current of $2A$ in the solenoid is reversed in $0.25\, s$, then the emf induced in the coil is

On moving a charge of $20\, C$ by $2\, cm, 2\, J$ of work is done, then the potential difference between the points is

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

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

An electromagnetic wave going through vacuum is described by $E=E_{0}\,\sin \left(kx-\omega t\right)$ Which of the following is/are independent of the wavelength?

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

The frequency of an $FM$ transmitter without signal input is called

Sky wave propagation is used in

Two light rays having same wavelength \(\lambda\) in vacuum are in phase initially. Then the first ray travels a path \(l_1\) through a medium of refractive index \(n_1\) while the second ray travels a path of length \(l_2\) through a medium of refractive index \(n_2\). The two waves are combined to observe interference. The phase difference between the two waves is

An AM wave has \(1800\,W\) of total power content. For \(100%\) modulation the carrier should have power content equal to

Two identical light sources \(S_1\) and \(S_2\) emit light of same wavelength \(\lambda\). These light rays will exhibit interference if

A fish, looking up through the water, sees the outside world contained in a circular horizon. If the refractive index of water is \(4/3\) and the fish is \(12\,cm\) below the surface of water, the radius of the circle in centimetre is

In Meter bridge or Wheatstone bridge for measurement of resistance, the known and the unknown resistances are interchanged. The error so removed is

In the hydrogen atom, the electron is making \(6.6\times 10^{15}\,rps\). If the radius of orbit is \(0.53\times 10^{-10}\,m\), then magnetic field produced at the centre of the orbit is

In the Bohr model of a hydrogen atom, the centripetal force is furnished by the coulomb attraction between the proton and the electron. If \(a_0\) is the radius of the ground state orbit, \(m\) is the mass and \(e\) is charge on the electron and \(\varepsilon_0\) is the vacuum permittivity, the speed of the electron is

Radio waves of certain double wavelength can pass through night waves do not. The reason is that radio waves

A potential difference of \(2V\) is applied between the opposite faces of a Ge crystal plate of area \(1\,cm^2\) and thickness \(0.5\,mm\). If the concentration of electrons in Ge is \(2\times 10^{19}\,m^{-3}\) and mobilities of electrons and holes are \(0.36\,m^2V^{-1}s^{-1}\) and \(0.14\,m^2V^{-1}s^{-1}\), then the current flowing through the plate will be

Using an AC voltmeter the potential difference in the electrical line in a house is read to be \(234\,V\). If line frequency is known to be \(50\) cycles/s, the equation for the line voltage is

There are a \(25W-220V\) bulb and a \(100W-220V\) bulb. Which electric bulb will glow more brightly?

Find the value of magnetic field between the plates of a capacitor at a distance \(1\,m\) from centre, where electric field varies by \(10^{10}\,V/m\) per second.

According to the Bohr's theory of hydrogen atom, the speed of the electron, energy and the radius of its orbit vary with the principal quantum number \(n\) respectively, as

Silver has a work function of \(4.7\,eV\). When ultraviolet light of wavelength \(180\,nm\) is incident upon it, potential of \(7.7\,V\) is required to stop photoelectrons reaching collector plate. The potential required to stop electrons when light of wavelength \(200\,nm\) is incident upon silver is

Two particles \(X\) and \(Y\) having equal charges, after being accelerated through the same potential difference, enter a region of uniform magnetic field and describe circular paths of radii \(R_1\) and \(R_2\) respectively. The ratio of masses of \(X\) and \(Y\) is

The power of a thin convex lens (\(n_g = 1.5\)) is \(5.0\,D\). When it is placed in a liquid of refractive index \(n_l\), then it behaves as a concave lens of focal length \(100\,cm\). The refractive index of the liquid \(n_l\) will be