# PHYSICS EXAM (FEDERAL PUBLIC SERVICE COMMISSION)

Jun 17th, 2015
Studypool Tutor
Price: \$10 USD

Tutor description

1. (a) Find a unit vector which is perpendicular to the vectors î +j and j + ?. (5) (b) If A = xz î – y2 j + 2x2y?ˆ and =x2yz2, find (15) 2. (a) Define angular momentum of a single particle and derive a relation between torque and angular momentum.

Word Count: 8611
Showing Page: 1/54
Year 2000FEDERAL PUBLIC SERVICE COMMISSIONCOMPETITIVE EXAMINATION FOR RECRUITMENT TO POSTSIN BPS - 17 UNDER THE FEDERAL GOVERNMENT, 2000PHYSICS PAPER - ITIME ALLOWED: 3 HOURS MAXIMUM MARKS: 100Note:- Attempt FIVE questions in all, including Question No.8 which is compulsory. All questions carry equal marks.1. (a) Find a unit vector which is perpendicular to the vectors +j and j + ?. (5)(b) If A = xz - y2 j + 2x2y?? and =x2yz2, find (15)2. (a) Define angular momentum of a single particle and derive a relation between torque and angular momentum. (10)(b) Calculate the angular momentum, about the Earth's center of a 50 kg person on the equator of the rotating earth. (10)3. Describe with the help of necessary diagrams the details of Michelson-Morley experiment. What was the conclusion drawn from the results of the experiment. (20)4. (a) Write down Maxwell's distribution function for molecular speeds in a gas. Give the details of various parameters involved. (10)(b) A container filled with N molecules of Oxygen gas is maintained at 300 K. What fraction of the molecules has speeds in the range 599-601 m/see? The molar mass M of Oxygen is 0.032 kg/mole. (10)5. Differentiate between Phase and Group velocities. Given that phase velocity V of waves in deep water is (g l /2p ) 1/2 ,find their group velocity v. (20)6. What is interferometer? Describe the construction and working principle of an interferorneter with which you are familiar. (20)7. Write short n

## Review from student

Studypool Student
" Excellent work as usual "

1821 tutors are online

### Other Documents

06/17/2015
06/17/2015
06/17/2015
06/17/2015
06/17/2015

Brown University

1271 Tutors

California Institute of Technology

2131 Tutors

Carnegie Mellon University

982 Tutors

Columbia University

1256 Tutors

Dartmouth University

2113 Tutors

Emory University

2279 Tutors

Harvard University

599 Tutors

Massachusetts Institute of Technology

2319 Tutors

New York University

1645 Tutors

Notre Dam University

1911 Tutors

Oklahoma University

2122 Tutors

Pennsylvania State University

932 Tutors

Princeton University

1211 Tutors

Stanford University

983 Tutors

University of California

1282 Tutors

Oxford University

123 Tutors

Yale University

2325 Tutors