List of top Physics Questions asked in VITEEE

Two sources of equal emf are connected to a resistance \( R \). The internal resistance of the sources are \( r_1 \) and \( r_2 \), \( (r_1>r_2) \). If the potential difference across the source having internal resistance \( r_2 \) is zero, then
An electron of mass \( 9.0 \times 10^{-31} \) kg under the action of a magnetic field moves in a circle of radius 2 cm at a speed of \( 3 \times 10^6 \) m/s. A proton of mass \( 1.8 \times 10^{-27} \) kg moves in a circle of same radius in the same magnetic field, then its speed will become
The ionization energy of hydrogen in the ground state is
Two points masses, \( m \) each carrying charges \( -q \) and \( +q \) are attached to the ends of a massless rigid non-conducting wire of length \( L \). When this arrangement is placed in a uniform electric field, then it deflects through an angle \( \theta \). The minimum time needed by rod to align itself along the field is
A condenser of capacitance \( C \) is fully charged by a 200V supply. It is then discharged through a small coil of resistance \( r \) embedded in thermally insulated block of specific heat 250 J/K-g and mass 100 g. If the temperature of the block rises by 0.4 K, then the value of \( C \) is
Equal charges \( q \) each are placed at the vertices of an equilateral triangle of side \( r \). The magnitude of electric field intensity at any vertex is
The de-Broglie wavelength of an electron moving with a velocity of \(10^6\) m/s is:
The electric field at the center of a uniformly charged spherical shell is
When the momentum of a photon is changed by an amount \( p' \), then the corresponding change in the de-Broglie wavelength is found to be 0.20%. Then, the original momentum of the photon was
When a hydrogen atom is raised from ground energy level to excited energy level, then
The angular momentum of an electron in Bohr’s hydrogen atom whose energy is -3.4 eV is
The half-life for \(\alpha\)-decay of uranium \( U^{228} \) is 4.47 × 10\(^8\) yr. If a rock contains 60% of the original \( U^{228} \) atoms, then its age is
A nuclear transformation is given by \[ Y(n, \alpha) \rightarrow L_i^{1} \] . The nucleus of element Y is
Suppose a beam of electrons with each electron having energy \( E_0 \) incident on a metal surface kept in an evacuated chamber. Then,
An n-type semiconductor is
The masses of three copper wires are in the ratio $2 : 3 : 5$ and their lengths are in the ratio $5 : 3 : 2$ .Then, the ratio of their electrical resistances is
A current of $2\,A$ is flowing in the sides of an equilateral triangle of side $9\, cm$. The magnetic field at the centroid of the triangle is
In a potentiometer experiment, the balancing length of a cell is $560\, cm$. When an external resistance of $10 \, \Omega$ is connected in parallel to the cell, the balancing length changes by $60 \,cm$.The internal resistance of a cell is
Two sources of equal emf are connected to a resistance $R$. The internal resistance of these sources are $r_1$ and $r_2 (r_1 > r_2 )$. If the potential difference across the source having internal resistance $r_2$ is zero, then
A horizontal rod of mass $0.01\,kg$ and length$ 10\, cm $ is placed on a frictionless plane inclined at an angle $60^{\circ}$ with the horizontal and with the length of rod parallel to the edge of the inclined plane. A uniform magnetic field is applied ?Vertically downwards. If the current through the rod is $1.73\, A$, then the value of magnetic field induction $B$ for which the rod remains stationary on the inclined plane is
The refractive index for a prism is given as $\mu = \cot \frac{A}{2}$. Then, angle of minimum deviation in terms of angle of prism is
An n-type semiconductor is
A galvanometer with a scale divided into $100$ equal divisions has a current sensitivity of $10$ divisions per milliampere and a voltage sensitivity of $2$ divisions per millivolt. The galvanometer resistance will be
An electron of mass $9.0 \times 10^{-31} kg$ under the action of a magnetic field moves in a circle of radius $2\, cm$ at a speed of $3 \times 10^6 \, m/s$ . If a proton of mass $1.8 \times 10^{27} \, kg$ was to move in a circle of same radius in the same magnetic field, then its speed will become
A $30\,V-90\,W$ lamp is operated on a $120\,V$ DC line. A resistor is connected in series with the lamp in order to glow it properly. The value of resistance is