Physics Exam Preparation
Full explanation, worked examples & memory tricks in the app
🎯 Exam Preparation Kit
Physics Exam Preparation
English 22 leveled MCQs Free
Shared by a Veda learner · Generated with Veda AI
Smart notes
1
What you'll study, topic by topic
Solved paper preview
Sample questions with model answers
Every question in the paper gets a full exam-length answer in the app — organised by marks, the way a topper writes it.
5 marks Long answer
Derive an expression for velocity of the particle for well of Death.
Show answer outline
Velocity expression derived from energy conservation principles.
The full exam-length answer is in the app.
5 marks Long answer
State and prove principal of conservation of Angular momentum.
Show answer outline
Angular momentum is conserved in an isolated system.
The full exam-length answer is in the app.
5 marks Long answer
Derive an Relation between surface tension & surface Energy.
Show answer outline
Surface tension is the change in surface energy per unit area.
The full exam-length answer is in the app.
5 marks Long answer
Derive an expression for molar specific heat of a monoatomic gas at constant volume.
Show answer outline
Molar specific heat at constant volume is \( C_v = rac{3R}{2} \).
The full exam-length answer is in the app.
5 marks Long answer
Derive an expression for differential eq'n. for Linear SHM.
Show answer outline
Differential equation is \( rac{d^2x}{dt^2} + \omega^2 x = 0 \).
The full exam-length answer is in the app.
5 marks Long answer
Derive the decay law of radioactivity and state SI unit of 'activity'.
Show answer outline
Decay law: \( N(t) = N_0 e^{-\lambda t} \), SI unit of activity is Becquerel (Bq).
The full exam-length answer is in the app.
5 marks Long answer
State Einstein's photoelectric eq'n. Hence, explain any two characteristics of photoelectric effect.
Show answer outline
Einstein's equation: \( E = hf - \phi \); characteristics include threshold frequency and kinetic energy of emitted electrons.
The full exam-length answer is in the app.
5 marks Long answer
Derive an expression for electric potential due to a point charge.
Show answer outline
Electric potential \( V = rac{kQ}{r} \).
The full exam-length answer is in the app.
5 marks Long answer
Obtain an expression for the electric intensity at a point outside a uniformly charged spherical shell.
Show answer outline
Electric intensity outside a shell is \( E = rac{kQ}{r^2} \).
The full exam-length answer is in the app.
5 marks Long answer
Show that all harmonics are present in the case of an air column vibrating in a pipe open at both the end.
Show answer outline
All harmonics are present due to boundary conditions at both ends.
The full exam-length answer is in the app.
5 marks Long answer
Derive an expression for equation of stationary wave on stretched string. Show that the distance between two successive nodes or antinodes is λ/2.
Show answer outline
Distance between nodes is \( rac{\lambda}{2} \) derived from wave equation.
The full exam-length answer is in the app.
5 marks Long answer
Discuss analytically the composition of two linear SHMs having same period and along the same path. Obtain the expression for resultant amplitude.
Show answer outline
Resultant amplitude is derived using phasor addition.
The full exam-length answer is in the app.
5 marks Long answer
Prove the Mayer's relation: Cp - Cv = R/J.
Show answer outline
Mayer's relation connects heat capacities and gas constant.
The full exam-length answer is in the app.
5 marks Long answer
State differential eq'n of Linear SHM. Hence expression for acceleration, velocity and displacement of a particle performing SHM.
Show answer outline
Differential equation: \( rac{d^2x}{dt^2} + \omega^2 x = 0 \); expressions for \( a, v, x \) derived.
The full exam-length answer is in the app.
5 marks Long answer
On the basis of kinetic theory of gases obtain an expression for pressure exerted by gas molecules enclosed in a container on its walls.
Show answer outline
Pressure derived as \( P = rac{1}{3} rac{Nm}{V} \).
The full exam-length answer is in the app.
5 marks Long answer
Derive Laplace's law for spherical membrane of bubble due to surface tension.
Show answer outline
Laplace's law relates pressure difference to surface tension and radius.
The full exam-length answer is in the app.
4 marks Medium answer
Define: Angle of contact & write properties of Angle of contact.
Show answer outline
Angle of contact is the angle between liquid surface and solid surface.
The full exam-length answer is in the app.
4 marks Medium answer
Two tuning forks of frequencies 320Hz and 340 Hz are sounded together to produce sound wave. The velocity of sound in air is 326.4m/s. Calculate the difference in wavelength of these waves.
Show answer outline
Difference in wavelength is calculated using \( \Delta \lambda = rac{v}{f_1} - rac{v}{f_2} \).
The full exam-length answer is in the app.
4 marks Medium answer
(ii) A pipe open at both the ends has a fundamental frequency of 600Hz. The first overtone of a pipe closed at one end has the same frequency as the first overtone of the open pipe. How long are the two pipes? [Velocity of sound in air = 330m/s]
Show answer outline
Length of pipes calculated using \( L = rac{v}{f} \).
The full exam-length answer is in the app.
3 marks Medium answer
Differentiate between free vibration & force vibration.
Show answer outline
Free vibration occurs without external force; forced vibration requires an external force.
The full exam-length answer is in the app.
2 marks Short answer
What is the effect of impurity on surface tension of liquid.
Show answer outline
Impurities generally decrease surface tension.
The full exam-length answer is in the app.
2 marks Short answer
(i) State the law of length and the law of linear density for a vibrating string.
Show answer outline
Law of length: frequency is inversely proportional to length; linear density affects frequency.
The full exam-length answer is in the app.
Study it properly — free, in the app
The full Veda Bites deck, complete notes, spaced-repetition flashcards, leveled MCQs, tests and games for this kit — plus Daily Facts and the Arena, every day.