**TUEE 2017 Tezpur University M.Sc in Physics Admission & Entrance Exam 2016 M.Sc in Physics Previous Year Model Question Papers.**

**MSc. IN PHYSICS**

**Model Questions for Entrance Examination**

Full Marks : 100 Time : 2 hours

**Syllabus: B.Sc. Physics (Honours)** *syllabus of any Indian University Entrance test has two parts, Part A and Part B of 50 marks each and is of a total duration of 2 hours.*

**Part A**consists of 50 objective type questions of one mark each. Duration for this part is one hour.**Part B co**nsists of short descriptive type questions to examine the conceptual clarity and reasoning ability of the candidate. The candidate is required to attempt any 5 questions of 10 marks each out of about 10 given questions.

*Typical questions for Part A and Part B are given below:*

### PART – A

**Excitons are**

(a) excited electrons in pairs (b) neutron-proton pairs

(c) bound electron-electron pairs (d) bound electron-hole pairs

**Hamiltonian formalism is easier to handle than Lagrangian formalism because Hamiltonian formalism involves**

(a) first order differential equations

(b) generalized momentum instead of generalized co-ordinates

(c) only cartesian co-ordinates

(d) no time derivatives

**An electric potential field is produced by joint charges 1 mC and 4 mC located at (-2, 1, 5) and (1, 3, -1) respectively. The energy stored in the field is**

(a) 2.57 mJ (b) 5.14 mJ

(c) 0.28 mJ (d) 20.56 mJ

**Which of the following potentials does not satisfy the Laplace’s equation?**

(a) V = 2x + 5 (b) V = 10 xy

(c) V = 2x2y + 5x + 2 (d) V = 3y + 10

**The expression which implies the nonexistence of magnetic monopoles is**

(a) Ñ x E = -¶B/¶t (b) Ñ.B = 0

(c) Ñ x B = m0J (d) Ñ.J + ¶r/¶t = 0

### PART – B

- Starting from the Langragian equation, prove that the equation of motion a simple pendulum is .. g θ + — sin θ = 0 l

where θ, g and 1 are angular displacement, acceleration due to gravity and length of the string respectively.

- Find the energy release, if two
_{1}H^{2}nuclei fuse together to form_{2}He^{4}nucleus where the binding energies per nucleon of_{1}H^{2}and_{2}He^{4}are 1.1 MeV and 7.0 MeV respectively. - The electrostatic potential due to a certain charge distribution is given by the expression :

V(x, y, z) = – (x2yz + xy2z + xyz2) volts

Calculate the electric field and charge density at the point (2, 1, 3)

- A half wave rectifier uses load resistor RL = 8kW and shunt filter capacitor of 12mF. The sinusoidal input voltage is 20sin2p50t. The angle of conduction is 400. Assuming the rectifier to be ideal (Rf = 0, Rp = ¥) calculate :

1) dc load current Idc

2) dc output voltage Vdc

3) ripple voltage VR

4) ripple factor y (cos 400 = 0.7660)

*(i) Explain which of the following nuclear reactions are allowed or forbidden.*

(a) 0n1®1p1+-1e0+ve

(b) 0n1®1p1+-1e0+ve

*(ii) Draw the energy level diagram showing anomalous Zeeman effect. Can it be explained by classical theory ? Explain.*

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