# BE Printing and Packaging Technology Semester 1 (FE First Year) - University of Mumbai Important Questions

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Calculate the frequency and wavelength of photon whose energy is 75eV.

Appears in 2 question papers
Chapter: [2] Quantum Mechanics
Concept: De Broglie Wavelength

Obtain one dimensional time dependent time independent Schrodinger equation.

Appears in 2 question papers
Chapter: [2] Quantum Mechanics
Concept: Schrodinger’S Time Dependent Wave Equation

What is the significance of wave function ? derive the expression for energy eigen values for the free particle in one dimensional potential well.

Appears in 2 question papers
Chapter: [2] Quantum Mechanics
Concept: Wave Function

Draw the energy band diagram  of p-n junction diode in forward and reverse bias condition .

Appears in 2 question papers
Chapter: [3] Semiconductor Physics
Concept: Fermi Level Diagram for P-N Junction

Mobility of electron and hole in a sample of Ge at room temperature are 0.36 m2 /V-sec and 0.17m2 /V-sec respectively. If electron and holes densities are equal and it is 2.5 ×1013 /cm3 , calculate its conductivity.

Appears in 2 question papers
Chapter: [3] Semiconductor Physics
Concept: Conductivity, mobility, current density (drift & diffusion) in semiconductors(n type and p type)

State the Hall effect. Derive the expression for Hall voltage and Hall coefficient with neat diagram.

Appears in 2 question papers
Chapter: [3] Semiconductor Physics
Concept: Hall Effect

What is photovoltaic effect? Explain the principle and working of solar cell.

Appears in 2 question papers
Chapter: [3] Semiconductor Physics
Concept: Applications of semiconductors : Rectifier diode, LED, Zener diode, Photo diode, Photovoltaic cell, BJT, FET, SCR., MOSFET

“Superconductor is a perfect diamagnetic”, Explain.

Appears in 2 question papers
Chapter: [4] Superconductivity
Concept: Meissner Effect

What is reverberation time? How it is important ? write the factors affecting reverberation time.

Appears in 2 question papers
Chapter: [6] Acoustics
Concept: Reflection of Sound(Reverberation and Echo)

A hall of dimension 25×18×12m3 has an average absorption coefficient 0.2. find the reverberation time. If a curtain cloth of area 150m2 is suspended at the  centre of Hall with coefficient of absorption 0.75, What will be the reverberation
time?

Appears in 2 question papers
Chapter: [6] Acoustics
Concept: Reflection of Sound(Reverberation and Echo)

State the piezoelectric effect. With neat circuit diagram explain the principle and working of piezoelectric oscillator .

Appears in 2 question papers
Chapter: [7] Ultrasonics
Concept: Piezoelectric Oscillator

Explain food chain.

Appears in 2 question papers
Chapter: [1] Overview of Environmental Aspects
Concept: Overview of Food Chain

Explain various modes needed for public awareness to protect earth from environmental degradation.

Appears in 2 question papers
Chapter: [1] Overview of Environmental Aspects
Concept: Need for Public Awareness of Environmental Education

Explain need and importance of Environmental studies?

Appears in 2 question papers
Chapter: [1] Overview of Environmental Aspects
Concept: Definition, Scope and Importance of Environmental Study

Explain the classification of ecosystem.

Appears in 2 question papers
Chapter: [1] Overview of Environmental Aspects
Concept: Ecosystem

Discuss the case study of cloudburst and landslide at kedarnath.

Appears in 2 question papers
Chapter: [1] Overview of Environmental Aspects
Concept: Global Crisis Related to – Population, Water, Sanitation and Land

What is meant by E-pollution?

Appears in 2 question papers
Chapter: [3.01] E‐Pollution
Concept: Definition, Sources and Effects of E-Pollution

Explain causes and effects of ozone layer depletion.

Appears in 2 question papers
Chapter: [3.06] Air Pollution
Concept: Sources of Air Pollution

Discuss various indoor air pollutants.

Appears in 2 question papers
Chapter: [3.06] Air Pollution
Concept: Sources of Air Pollution

Discuss the case study of ‘London smog’.

Appears in 2 question papers
Chapter: [3.06] Air Pollution
Concept: Consequences of Air Pollution > Photochemical Smog
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