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# (Syllabus) RAS Pre-Syllabus: Physics (Code No. 24)

## Rajasthan Public Service Commission

## RAS Pre-Syllabus: Physics (Code No. 24)

**1. Mechanics :** Units and dimensions, S.I. units, Motion in one and two
dimensions. Newton's laws of motion with applications. Variable mass-systems,
Fricitional forces, Work, Power and Energy. Conservative and non conservative
systems. Collisions, Conservation of energy. Linear and angular momenta.
Rotational kinematics, Rotational dynamics. Equilibrium or rigid bodies.
Gravitation, Planetary motion, Artificial Satellites. Surface tension and
Viscosity. Fluid dynamics, streamline and turbulent motion. Bernoulli's equation
with applications. Stoke's law and its application, Special theory of
relativity, Lorentz Transformation, Mass Energy equivalence.

**2. Wave & Oscillations : **Simple harmonic motion, Travelling &
Stationary waves, Super position of waves, Beats, Forced oscillations, Damped
oscillations, Resonance, Sound waves, Vibrations of air columns, strings and
rods. Ultrasonic waves and their application. Doppler effect.

**3. Optics:** Matrix method in preaxial optics. Thin lens formulae, Nodal
planes, Systems of two thin lenses, Chromatic and Spherical aberration, Optical
instruments, Eyepieces, Nature and propagation of Light, Interference, Division
of wavefront, Division of amplitude, Simple interferometers. Diffraction -
Fraunhofer and Fresnel, Gratings. Resolving power of optical instruments.
Rayleigh criterion, Polarization, Production and Detection of Polarized light.
Rayleigh Scattering. Raman Scattering, Lasers and their applications.

**4. Thermal Physics :** Thermometry, laws of thermodynamics, Heat
engines, Entropy, Thermodynamic potentials and Maxwell's relations. Vander
waal's equation of State, Critical constants. Joule-Thomoson effect, Phase
transition, Transport phenomenon, heat conduction and specific heat in solids,
Kinetic Theory of Gases, Ideal Gas equation, Maxwell's velocity distribution,
Equipartition of Energy, Mean free path, Brownian Motion, Black-body radiation
Planck's Law.

**5. Electricity and Magnetism : **Electric charge, Fields and Potentials,
Coulomb's Law, Gauss Law, Capacitance, Dielectrics. Ohm's Law, Kirchoff's Laws,
Magnetic field, Ampere's Law, Faraday's Law of electromagnetic induction, Lanz's
Law, Alternating currents, LCR Circuits, Series & Parallel resonance, Q-factor,
Thermoelectric effects and their applications, Electromagnetic Waves, Motion of
charged particles in electric and magnetic fields. Particle accelerators, Ven de
Graaff generator, Cyclotron, Betatron, Mass spectrometer, Hall effect. Dia, Para
and ferro magnetism.

**6. Modern Physics :** Bohr's Theory of Hydrogen atom, Optical and X-ray
spectra, Photoelectric effect. Compton effect, Wave nature of matter and
Wave-Particle duality, Natural and artificial radio-acitivty, alpha, beta and
gamma radiation, chain decay, Nuclear fission and fusion. Elementary particles
and their classification.

**7. Electronics : **Vacuum tubes-diode and triode, p-and n-type
materials, p-n diodes and transistors, Circuits for rectification, amplification
and oscillations. Logic gates.