This set of Engineering Physics Multiple Choice Questions & Answers (MCQs) focuses on “Solar Cell”. 1. A solar cell is a ___________ a) P-type semiconductor b) N-type semiconductor c) Intrinsic semiconductor d) P-N Junction 2. Which of the following materials cannot be used as solar cells materials? a) Si b) GaAs c) CdS d) PbS … Read more
This set of Engineering Physics Multiple Choice Questions & Answers (MCQs) focuses on “Classification of Semiconductors”. 1. What is the energy level below which all levels are completely occupied at Zero Kelvin called? a) Boson Energy b) Fermi Energy c) Stable Energy d) Ground Energy 2. What are the current carriers in semiconductors? a) Electrons … Read more
This set of Engineering Physics Interview Questions and Answers for freshers focuses on “Hall Effect”. 1. When does a normal conductor become a superconductor? a) At normal temperature b) At Curie temperature c) At critical temperature d) Never 2. In which of the following does the residual resistivity exist? a) Impure metal at high temperature … Read more
This set of Engineering Physics Questions and Answers for Freshers focuses on “Properties of Semiconductors – 2”. 1. Which method can be used to distinguish between the two types of carriers? a) Hall effect b) Rayleigh method c) Doppler effect d) Fermi effect 2. Find the resistance of an intrinsic Ge rod cm long, 1mm … Read more
This set of Engineering Physics Multiple Choice Questions & Answers (MCQs) focuses on “Properties of Semiconductors – 1”. 1. How does a semiconductor behave at absolute zero? a) Conductor b) Insulator c) Semiconductor d) Protection device 2. Semiconductor acts as an insulator in the presence of impurities. a) True b) False 3. How is the … Read more
This set of Engineering Physics Multiple Choice Questions & Answers (MCQs) focuses on “Free Electron Theory”. 1. What does the conductivity of metals depend upon? a) The nature of the material b) Number of free electrons c) Resistance of the metal d) Number of electrons 2. The free electrons collide with the lattice elastically. a) … Read more
This set of Engineering Physics Multiple Choice Questions & Answers (MCQs) focuses on “Dielectric Breakdown”. 1. Which of the following is the correct expression for the dielectric strength? a) d/Vb b) Vb/d c) Vbd d) Vb/d2 2. Mica has a dielectric strength of _____________ a) 50 X 106 V/m b) 100 X 106 V/m c) … Read more
This set of Engineering Physics Multiple Choice Questions & Answers (MCQs) focuses on “Types of Dielectric Materials”. 1. What are the two types of dielectrics? a) Ferroelectric and Piezoelectric b) Polar and Non-polar c) Active and Non-active d) Stable and Non-stable 2. Which gas is used for insulation? a) N2 b) O2 c) CO d) … Read more
This set of Engineering Physics Multiple Choice Questions & Answers (MCQs) focuses on “Piezoelectricity”. 1. Piezoelectric effect is when materials produce electric charges when ____________ a) Voltage is applied b) Mechanical Stress is applied c) Electric field is applied d) Magnetic field is applied 2. Piezoelectricity means _________________ a) Electric polarization b) Electric dielectric c) … Read more
This set of Engineering Physics Multiple Choice Questions & Answers (MCQs) focuses on “Ferroelectricity”. 1. Dielectrics which show spontaneous polarization are called as __________ a) Pyroelectric b) Piezoelectric c) Ferroelectric d) Centrosymmetric 2. Polarization in Ferroelectric materials is ___________ a) Permanent b) Spiked c) Linear d) Reversible 3. All ferroelectric materials are pyroelectric and piezoelectric. … Read more
