Engineering Physics 2 - May 2014

First Year Engineering (Semester 2)

TOTAL MARKS:
TOTAL TIME: HOURS

1 Define drift velocity.(2 marks) 10 List out the various forms of carbon nano tubes.(2 marks)

Answer the any one question from Q11 (a) & Q11 (b)

11 (a) Derive expression for electrical and thermal conductivities on the basis of classical free electron theory and deduce the value of Lorentz number.(16 marks) 11 (b) Derive an expression for density of states in a metal and hence obtain the Fermi energy in terms of density of free electrons.(16 marks)

Answer the any one question from Q12 (a) & Q12(b)

12 (a) Derive expression for the carrier concentration in an intrinsic semiconductor.(16 marks) 12 (b) What is Hall effect and give its origin? Describe an experiment for the measurement of the Hall coefficient and Hall Voltage.(16 marks)

Answer the any one question from Q13 (a) & Q13 (b)

13 (a) (i) Discuss the domain structure in ferromagnetic materials. Show how hysteresis curve is explained on the basis of domain theory.(10 marks) 13 (a) (ii) Differentiate soft and hard magnetic materials.(6 marks) 13 (b) (i) Explain Meissner effect. How it is used to classify the Type-I and Type-II superconductors?(8 marks) 13 (b) (ii) Write short notes on SQUID and magnetic levitation.(8 marks)

Answer the any one question from Q14 (a) & Q14 (b)

14 (a) What is meant by local field in dielectric? Deduce Clausius-Mosotti equation.(16 marks) 14 (b) What is dielectric breakdown? Write in detail about the various factors contributing to breakdown in dielectrics.(16 marks)

Answer the any one question from Q15 (a) & Q15 (b)

15 (a) Give an account on Shape Memory Alloys (SMA) and their applications.(16 marks) 15 (b) What is meant by CNT? Describe any three methods for producing nano-tubes.(16 marks) 2 What are the sources of resistance in metals?(2 marks) 3 State the properties of a semiconductor.(2 marks) 4 What is meant by the law of mass action in semiconductor.(2 marks) 5 Give Curie-Weiss law and its importance.(2 marks) 6 What is meant by hysteresis loop and what do you infer form it?(2 marks) 7 What are dielectric materials? Give their properties.(2 marks) 8 Distinguish Lorentz force and Coulomb force in dielectrics.(2 marks) 9 What do you understand by the term queching?(2 marks)