In this section, you will get JKBOSE Class 12 Physics Model Paper 2025. Click to check these questions to perform better in your exam.
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Physics Important Questions for JKBOSE Board Exam 2025
These questions are very important from the examination point of view. This list has been prepared by the experts who have a teaching experience of more than 8 years at higher secondary level. Check the questions below.
Long Answer Questions
1, Using Biot Savart law, derive an expression for The magnetic field due to a circular loop carrying current at any point on its axis.
2, Derive an expression for the energy stored in an inductor.
3, What is a Wheatstone bridge? Apply Kirchoff’s laws to explain how it works.
4, Find the expression for electric field due to an electric dipole on any point lying on its equatorial line.
5, What is a parallel plate capacitor? Derive an expression for its capacitance.
6, Find an expression for the force between two infinitely long straight parallel conductors carrying current in the same direction.
7, What is the mean value (Im) of AC? Prove that Im = 0.637 I0, where I0is the peak value of AC.
8, Define wave front. Use Huygen’s principle to verify the laws of refraction.
9, What is Lens makers formula. Derive an expression for it.
10, Draw the circuit diagram of a half wave rectifier and explain how it works.
11, Derive Einstein’s photo electric equation and show that the photoelectric emission is not possible if the frequency of incident wave is less than the threshold frequency.
12, Derive an expression for the distance of closest approach when an alpha particle is projected towards an atom of atomic number Z.
13, Draw the plot of binding energy per nucleon (BE/A) as a function of mass number A. Write two important conclusions that can be drawn from it.
Short Answer Questions
1, Explain how photoelectric effect shows that light has a particle nature.
2, A difference of 2.3 eV separates two energy levels in an atom. What is the frequency of radiation emitted when the atom make a transition from the upper level to the lower level?
3, The speed of light in two media I and Il are 1.8 x 108m/s and 2.4 x 108 m/s respectively.
Find the critical angle for light refracting from I and Il medium.
4, Differentiate between P type and N type semiconductors?
5, What is biasing in case of a PN junction diode? Explain the forward bias characteristics of a PN junction diode.
6, What is a photon? Write down its any four properties.
7, Prove that in case of a prism i + e = D + A, where the symbols have their usual meanings.
8, What are Ferromagnetic, Paramagnetic and Diamagnetic materials.
9, Write any 5 properties and three uses of electromagnetic waves.
10, What are eddy currents and also write down their two applications.
11, What is drift velocity? Derive its expression.
12, Three charges Q, +q and +q are placed at the vertices of an equilateral triangle of side l. If the net electrostatic energy of the system is zero, the find the value of Q in terms of q.
13, A wire 12cm long and carrying a current of 2A is placed perpendicular to a uniform magnetic field. If a force of 0.8N acts on it, calculate the value of magnetic field.
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