The critical temperature for lead is 7.1 K. At 6 K the superconducting property disappears if it is subjected to a magnetic field of 4.67 * 104 A/m. Find H0.
Explain properties Meissner Effect and Effect of magnetic field for Superconductors.
A hall of volume 1000 m3 is found to have a reverberation time of 2.5 s. If the area of the sound absorbing surface is 5000 cm2, calculate the average absorption coefficient.
What is simple harmonic motion? Obtain its differential equation with graphical representation. Write equation for its potential energy and kinetic energy in terms of amplitude of a wave.
What is damped harmonic motion. Solving its differential equation, obtain equation for its overdamped and underdamped conditions.
A rectangular solid has dimensions 6 x 6 x 2 cm. A force of 0.2 N, applied tangentially to the upper surface, causes a displacement of 5 mm relative to the lower surface. Calculate the shearing strain, stress and rigidity modulus.
State types of moduli of elasticity. Derive relation of Young’s modulus and modulus of rigidity.
Calculate the Young’s modulus in the cantilever depression method used. The length of the cantilever is 1 m which is suspended with a load of 150 gm. The depression is found to be 4 cm. The thickness of the beam is 5 mm and breadth of the beam is 3 cm.
What is the ratio of the stimulated emission to spontaneous emission at a temperature of 250 °C for the sodium D line?
Discuss with suitable diagram the piezoelectric method for ultrasonic wave generation. State its advantages and disadvantages.
Find the maximum velocity and acceleration of a particle performing SHM of period 20 π s and amplitude 10 cm.
Discuss acoustic grating method for finding velocity of ultrasonic waves in medium.
An Ultrasonic source of 0.07 MHz sends down a pulse towards the seabed which returns after 0.35 sec. The velocity of sound in water is 1800 m/s. Calculate the depth of sea and wavelength of pulse.
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Official Gujarat Technological University (GTU) examination paper and step-by-step solutions for Physics (Winter 2025, 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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