List of top Physics Questions asked in VITEEE

If the total emf in a thermocouple is a parabolic function expressed as \( E = at + \frac{1}{2}bt^2 \), which of the following relations does not hold good
Twelve wires of each resistance 6 ohms are connected to form a cube as shown in the figure. The current enters at a corner A and leaves at the diagonally opposite corner G. The joint resistance across the corners A and G are
A uniform copper wire of length 1m and cross-sectional area \(5 \times 10^{-7} \, \text{m}^2\) carries a current of 1A. Assuming that there are \(8 \times 10^{28} \, \text{free electrons/m}^3\) in copper, how long will an electron take to drift from one end of the wire to the other?
Two point like charges Q1 and Q2 of whose strength are equal in absolute value are placed at a certain distance from each other. Assuming the field strength to be positive in the positive direction of x-axis the signs of the charges Q1 and Q2 for the graphs (field strength versus distance) shown in Figures 1, 2, 3, and 4 are
ABCD is a rectangle. At corners B, C, and D of the rectangle are placed charges \( +10 \times 10^{-12}C \), \( -20 \times 10^{-12}C \), and \( +10 \times 10^{-12}C \) respectively. Calculate the potential at the fourth corner. The side AB = 4 cm and BC = 3 cm
A parallel plate capacitor of capacitance 100 pF is to be constructed by using paper sheets of 1 mm thickness as dielectric. If the dielectric constant of paper is 4, the number of circular metal foils of diameter 2 cm each required for the purpose is
The electric field intensity \( E \), due to an electric dipole of moment \( p \), at a point on the equatorial line is
A conductor and a semi-conductor are connected in parallel as shown in the figure. At a certain voltage both ammeters register the same current. If the voltage of the DC source is increased then
Radar waves are sent towards a moving airplane and the reflected waves are received. When the airplane is moving towards the radar, the wavelength of the wave
The transmission of high frequencies in a coaxial cable is determined by
The output stage of a television transmitter is most likely to be a
The antenna current of an AM transmitter is 8A when only the carrier is sent, but it increases to 8.93A when the carrier is modulated by a single sine wave. Find the percentage modulation.
In Boolean algebra, \( A \cdot B \) is equal to
Identify the logic gate from the following TRUTH table
The temperature coefficient of a zener mechanism is
Two identical P-N junctions are connected in series in three different ways as shown below to a battery. The potential drop across the P-N junctions are equal in
Two electrons moving in opposite direction with speeds 0.8c and 0.4c where \( c \) is the speed of light in vacuum. Then the relative speed is about
A photo-sensitive material would emit electrons if excited by photons beyond a threshold. To overcome the threshold, one would increase
The radius of nucleus is
Radio carbon dating is done by estimating in specimen
Ionization power and penetration range of radioactive radiation increases in the order
The half-life of a radioactive element is 3.8 days. The fraction left after 19 days will be
Indicate which one of the following statements is NOT CORRECT?
Identify the graph which correctly represents Moseley's law.
Assuming \( f \) to be the frequency of the first line in Balmer series, the frequency of the immediate next (i.e., second) line is