BE Electronics and Telecommunication Engineering Semester 1 (FE First Year) - University of Mumbai Important Questions

Define the critical temperature. Slow that in the superconducting state the material is perfectly diamagnetic. 

What is working principle of SQUID ? Explain how it is used to detect the magnetic field?

What is the working principle of maglev? Explain how it can acquire high speed?

Explain Meissner Effect with the help of diagram.

Differentiate between Type-1 & Type- II Superconductors.

What is reverberation time? Discuss sabine formula. 

State any five factors affecting the acoustics of the building and give the remedies for each. 

Explain the factors on which reverberation time depends .

A classroom has dimension 10×8×6m³. the reverberation time is 3 sec. calculate the total absorption of surface and average absorption. 

A conference room has a total volume of 2000 m3.The magnitude of total
absorption with in the conference room is100 Sabin.Calculate thereverberation time.

Discuss in details any three factors affecting acoustics of a hall with their
remedies.

State ‘magnetostriction effect’. Mention any two application of ultrasonic waves

An ultrasonic pulse of 0.09M Hz sends down towards the sea-bed which returns after 0.55 seconds. The velocity of ultrasonic waves in sea water is 1800 m/sec . calculate the depth of sea and wavelength of ultrasonic pulse.

Explain cavitation effect. 

Explain the principle, construction and working of a Magnetostriction Oscillator.

Discuss any three applications of Ultrasonic waves

State Norton’s theorem and draw the Norton’s equivalent circuit.

Using the mesh analysis find the mesh current in the direction shown and also find the voltage across A and B terminals.

Find current I_X using Superposition theorem

Determine the value of R for maximum power transfer and find the value of maximum transfer.