What is Cantilever? Obtain the expression for depression at free end of thin beam clamped horizontally at one end and loaded at other end.
What is damping motion? Derive the differential equation and general solution of damped harmonic motion.
Discuss in detail the different types of elasticity. List different factors affecting elasticity.
Calculate the length of nickel rod required to produce ultrasonic waves of frequencies of 50 kHz and 100 kHz. Consider the fundamental mode of vibrations of the rod. Given, density of nickel= 8908 kg/m3, Young’s modulus of the nickel= 2.14 × 1011 N/m2.
Describe production of ultrasonic waves by magnetostriction method. Give its advantages and limitations.
An elastic rod having diameter of 30 mm, 10 cm long extends by 2.5 cm under tensile load of 28 kN. Find the stress, strain and the Young’s modulus for the material of the rod.
A nickel rod having 5 cm length is vibrating at resonance. Calculate the fundamental frequency of vibration for which ultrasonic waves are generated. Given that Young’s modulus of the nickel= 2.14 × 1011 N/m2, density of nickel=
Explain in detail about the methods for the detection of ultrasound. Give any three applications of ultrasonic waves.
Determine the critical current for a superconducting ring of diameter 10-3 m at temperature 4.2 K. Given the critical temperature (Tc) for sample is 7.18 K and critical magnetic field at 0 K (Hc(0)) is 6.5 × 104 A/m.
Explain London penetration depth. Discuss various applications of superconductors.
A critical magnetic field of lead wire is 6.5 × 103 A/m at 0 K. At what temperature would the critical magnetic field of lead drop to 4.5 × 103 A/m if the critical temperature of lead is 7.18 K? What is the critical current density at that temperature if the diameter of the wire is 2 × 10-3 m?
Explain in detail construction and working of Ruby LASER with necessary schematic and energy level diagrams.
In He-Ne laser system, the two energy levels of Ne involved in lasing action have energy values of 20.66 eV and 18.70 eV. Population inversion occurs between these two levels. What will be the wavelength of a laser beam produced? What will be the population of the metastable energy level with respect to the upper excited level at 27 ºC?
Describe the construction and working principle of He-Ne LASER with suitable diagrams.
Explain the term (i) stimulated emission, (ii) population inversion, (iii) pumping and (iv) metastable state.
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Official Gujarat Technological University (GTU) examination paper and step-by-step solutions for Physics (Winter 2023, B.E. · Common Engineering, Sem 1). Features complete 70-mark regular & remedial examination pattern, official marking distribution across all 5 questions, and direct 1-click official PDF download.
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