PICKS OF THE WEEK
- AP spins from one madness to another By dumping statues of famous personalities in a lake, pro-Telangana activists have hurt the pride of Telugu people
- Maharashtra CM in deep troublePrithviraj Chavan’s chair has started to wobble following PM's statement on CVC and he has been caught lying
- Every 12 hours, one farmer commits suicide in IndiaThe numbers are stark and in your face: According to The National Crime Records Bureau (NCRB) data from 2009, more than 2,16, 000 farmers have killed themselves since 1997. Add the figures for 1995, 1996 and 2010 and the total crosses 2,50,000. That is, two farmers a day for the past 15 years.
- Rajat Gupta: Guile or genius?He is India's first global CEO. Former McKinsey director Rajat Kumar Gupta now finds himself embroiled in America's biggest insider trading scam
- Life after the Dalai LamaThe Dalai Lama announces retirement; to break away from tradition and transfer power.
III Mid
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
I B.Tech. III Mid Examinations, May– 2010
ENGINEERING PHYSICS
Objective Exam
Name: ______________________________ Hall Ticket No.
A
Answer All Questions. All Questions Carry Equal Marks. Time: 20 Min. Marks: 10.
I. Choose the correct alternative:
1. The material in which spontaneous polarization changes with temperature, is called [ ]
(A) ferroelectric (B) pyroelectric (C) piezoelectric (D) anti-ferromagnetic
2. Nickel zinc ferrites are used as cores in [ ]
(A) radios (B) TV transformers (C) transmitters (D) electromagnets
3. In multimode graded index fiber, light rays travel in different parts of the fiber [ ]
(A) with different speeds (B) with same speed
(C) with minimum speed (D) with maximum speed
4. In fiber optic communication system, the preferable source of light is [ ]
(A) LED (B) sodium lamp (C) mercury lamp (D) laser
5. The residential soundproofing aims to eliminate the effects of [ ]
(A) internal noise (B) reverberation (C) absorption (D) external noise
6. The magnetic susceptibility (χ) of a magnetic material is given by [ ]
(A) χ = (μr -1) (B) χ = (μr +1) (C) χ = (1 - μr) (D) χ = (μo -1)
7. The condition for lasing action is [ ]
(A) excitation (B) meta-stable state (C) population inversion (D) emission
8. The reverberation time for an auditorium is the time required for the intensity of sound to drop to
[ ]
(A) 10-9 times its initial value (B) 10-6 times its initial value
(C) 10-3 times its initial value (D) 10-8 times its initial value
9. Which of the following is not a stage of sol-gel formation? [ ]
(A) Agglomeration (B) Condensation (C) Hydrolysis (D) Sputtering
10. The relation between magnetic induction (B), magnetic field strength (H) and magnetization (M) is
[ ]
(A) B = H + M (B) B = M + μoH (C) B = μo (H + M) (D) M = B + μoH
Cont….2
www.jntuworld.com
www.jntuworld.com
JNTUWORLD
Code No: A109100104 :2: Set No. 1
II Fill in the blanks
11. The unit for measurement of displacement vector is _______________.
12. Above Curie temperature, the shape of B-H curve of a ferromagnetic material is in the form of a _______________________.
13. The phenomenon of expulsion of magnetic lines from a super-conductor is known as _______________________.
14. The unit of Einstein’s coefficient is _______________.
15. The synthesizing of nanomaterials from larger pieces of material, is called ___________ technique.
16. Ionic Polarization is __________________________ temperature.
17. The active element in ruby laser is __________________.
18. The acceptance angle of a fiber of numerical aperture 0.22, is ____________º.
19. A _________________ is a device for reducing the amount of noise emitted by a machine.
20. When the radius of a sphere is reduced to 2.0 nm, the surface area to volume ratio becomes ________________ per meter.
-oOo-
www.jntuworld.com
www.jntuworld.com
JNTUWORLD
Code No: A109100104 Set No. 2
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
I B.Tech. III Mid Examinations, May – 2010
ENGINEERING PHYSICS
Objective Exam
Name: ______________________________ Hall Ticket No.
A
Answer All Questions. All Questions Carry Equal Marks. Time: 20 Min. Marks: 10.
I. Choose the correct alternative:
1. In fiber optic communication system, the preferable source of light is [ ]
(A) LED (B) sodium lamp (C) mercury lamp (D) laser
2. The residential soundproofing aims to eliminate the effects of [ ]
(A) internal noise (B) reverberation (C) absorption (D) external noise
3. The magnetic susceptibility (χ) of a magnetic material is given by [ ]
(A) χ = (μr -1) (B) χ = (μr +1) (C) χ = (1 - μr) (D) χ = (μo -1)
4. The condition for lasing action is [ ]
(A) excitation (B) meta-stable state (C) population inversion (D) emission
5. The reverberation time for an auditorium is the time required for the intensity of sound to drop to
[ ]
(A) 10-9 times its initial value (B) 10-6 times its initial value
(C) 10-3 times its initial value (D) 10-8 times its initial value
6. Which of the following is not a stage of sol-gel formation? [ ]
(A) Agglomeration (B) Condensation (C) Hydrolysis (D) Sputtering
7. The relation between magnetic induction (B), magnetic field strength (H) and magnetization (M) is
[ ]
(A) B = H + M (B) B = M + μoH (C) B = μo (H + M) (D) M = B + μoH
8. The material in which spontaneous polarization changes with temperature, is called [ ]
(A) ferroelectric (B) pyroelectric (C) piezoelectric (D) anti-ferromagnetic
9. Nickel zinc ferrites are used as cores in [ ]
(A) radios (B) TV transformers (C) transmitters (D) electromagnets
10. In multimode graded index fiber, light rays travel in different parts of the fiber [ ]
(A) with different speeds (B) with same speed
(C) with minimum speed (D) with maximum speed
Cont…..2
www.jntuworld.com
www.jntuworld.com
JNTUWORLD
Code No: A109100104 :2: Set No. 2
II Fill in the blanks
11. The unit of Einstein’s coefficient is _______________.
12. The synthesizing of nanomaterials from larger pieces of material, is called ___________ technique.
13. Ionic Polarization is __________________________ temperature.
14. The active element in ruby laser is __________________.
15. The acceptance angle of a fiber of numerical aperture 0.22, is ____________º.
16. A _________________ is a device for reducing the amount of noise emitted by a machine.
17. When the radius of a sphere is reduced to 2.0 nm, the surface area to volume ratio becomes ________________ per meter.
18. The unit for measurement of displacement vector is _______________.
19. Above Curie temperature, the shape of B-H curve of a ferromagnetic material is in the form of a _______________________.
20. The phenomenon of expulsion of magnetic lines from a super-conductor is known as _______________________.
-oOo-
www.jntuworld.com
www.jntuworld.com
JNTUWORLD
Code No: A109100104 Set No. 3
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
I B.Tech. III Mid Examinations, May – 2010
ENGINEERING PHYSICS
Objective Exam