List of top Questions asked in GUJCET- 2025

For a resistor \( R \), the potential across it is given by \( 1.6 \times 10^{-6} \, \text{C} \) of charge and a voltage across it. The electrical potential due to this charge will depend on:
Two point charges are placed on either side of the system, and the electric field is applied with a voltage of 2V. If the electric potential is the same, what will be the interaction between the two charges \( P \) and \( Q \)?
For a head-on collision, calculate the total energy when the two bodies collide at a distance of 2 fm (femtometer).
In the nuclear fusion reaction \( 4^1H + 2e^- \to 2v + 6\gamma + \), what is the missing product?
Which isotope is represented by \( 12_6C \)?
What is the current flowing in the circuit shown? (The resistor is 100$Ω$, and the voltage is +6V and +5V).
In a p-n junction diode, when it is forward biased, what happens?
A resistor of value 200Ω and capacitance 15μF are connected in series. What is the total time constant of the circuit?
If an object moves with a velocity of 1 km/s and has a mass of 0.033 kg, calculate the de Broglie wavelength of the object.
The energy of a photon is \( 6.63 \times 10^{-34} \, \text{Js} \). Calculate the frequency of the photon in the visible light spectrum.
The energy of a photon is 13.6 eV. Calculate the wavelength of the photon if the energy is \( 5.3 \times 10^{-11} \, \text{m} \).
The energy of a photon in a hydrogen atom is \( -13.6 \, \text{eV} \). What are the possible energies of the electron in other levels of the hydrogen atom?
The angle \( \phi \) is the angle of elevation from the horizontal to the object. The angle of elevation of the object from the point of observation is \( 1^\circ \). The horizontal distance between the object and the observer is given as \( d \). What is the expression for the distance in terms of \( \phi \)?
In the diffraction experiment, the angle of diffraction for the first order is \( \theta \). The corresponding wavelength of light is:
In a double-slit experiment, the distance between the slits is 0.54 mm and the distance from the screen is 1.8m. If the distance between the adjacent maxima is 1.2 cm, then the wavelength of the light used in the experiment is:
What is the electric field in the vacuum when the frequency of the radiation is \( 10^{16} \, \text{Hz} \)?
A light wave with a frequency of \( 6 \times 10^{14} \, \text{Hz} \) strikes a surface, and the incident power is \( 4 \times 10^{-3} \, \text{W} \). Calculate the energy of each photon.
A 25 cm long object is placed between two mirrors forming an angle of 90°. What will be the number of images formed?
If an object is placed in front of a concave mirror at a distance of 46 cm, what will be the angle formed?
The top and bottom parts of a cylindrical tube are in contact with each other. Which statement is correct?