Day 35: MH HSC Class 12 Physics

5 questions. Try each one first, then open its answer.

Question 1
Wave Optics. Asked once: Feb 2023 (same type asked 6 times)
Q. 23 $In a biprism experiment, the fringes are observed in the focal plane of the eye-piece at a distance of 1.2 m from the slit. The distance between the central bright band and the 20th bright band is 0.4 cm. When a convex lens is placed between the biprism and the eye-piece, 90 cm from the eye-piece, the distance between the two virtual magnified images is found to be 0.9 cm. Determine the wavelength of light used.$
Question 2
Rotational Dynamics. Asked once: Jun 2025 (same type asked 5 times)
Q. 3 $Obtain an expression for moment of inertia of a uniform disc of mass 'M' and radius 'R' rotating about an axis passing through its centre and perpendicular to its plane.$
Question 3
Superposition of Waves. Asked once: Mar 2018 (same type asked 5 times)
Q. 4.A OR $What is meant by harmonics? Show that only odd harmonics are present as overtones in the case of an air column vibrating in a pipe closed at one end.$
Question 4
Superposition of Waves. Asked once: Mar 2019 (same type asked 5 times)
Q. 28 $A stretched sonometer wire is in unison with a tuning fork. When the length of the wire is increased by 5%, the number of beats heard per second is 10. Find the frequency of the tuning fork.$
Question 5
Electromagnetic Induction. Asked once: Mar 2016 (same type asked 4 times)
Q. 5(vii) $2.5 \times 10^{- 4}$

Question 1