Kerala Plus Two Physics Answer Key 2025 (Available): Unofficial Key PDF

1. The electrostatic force per unit charge is known is _________.

(b)

2. A circle of radius r is drawn with a charge +q is placed at the centre. The work done in moving a point charge around the circumference of the circle is __________.

zero

3. Which of the following gives the polarity of the induced emf?

(ii)

4. The frequencies of the gamma rays, ultraviolet rays, and x-rays are v1, v2, and v3 respectively. Then __________

(ii)

5. If the radius of the first electron orbit is r₀, radius of thr second electron orbit of hydrogen is _________________.

4r₀

6. Two thin lenses of power +4D and -2D are in contact. The focal length of the combination is ______.

-1/4

7. __________ process is responsible for the production of energy in the sun

Nuclear fusion

8. Show that the resistance of a conductor can be expressed by R=ml/(ne²τA)

To be Added Here

9. Relative permeability of a material μ_r< 1, identify the magnetic material. Write the relation between the relative permeability and magnetic susceptibility.

μ_r=1+χ

10. The instantaneous curent and voltage of an ac circuit are given by i=10sin314t Ampere and v=50sin(314t+π/2) Volt. What is the 
(a) phase difference between voltage and current?
(b) power dissipation in the circuit?

(a) π/2
(b) zero

11. (a) Which elecrtomagnetic wave is used in cellular phones to transmit voice communications?
(b) In the process of charging of a parallel plate capacitor, the current produed between the plates of the capacitor is _________

(a) Radiowaves
(b) (iii)

12. (a) Define wavefront.
(b) Figure shows a plane wavefront incident on a convex lens, draw the corresponding refracted wavefront.

(a) A wavefront is a surface of constant phase representing the leading edge of a propagating wave in a medium.
(b) spherical

13. What is meant by ionisation energy? Write its value for hydrogen atom.

13.6 eV

14. The carbon isotope ₆C¹² has a nuclear mass of 12.000000u. Calculate the binding energy of its nucleus.

 92.16 MeV

15. (b) Write an expression for torque acting on an electric dipole pleaced in a uniform electric field. When will it become maximum?

To be Added Here

2nd PUC Kannada Answer Key 2025 Unofficial Key PDF (To be Added Here)