NEB Class 12 Physics case studies
NEB Class 12 Physics · Put your knowledge to work in context.
NEB Class 12 Physics (कक्षा १२ भौतिकशास्त्र) is the Physics paper of the Grade 12 annual examination run under the National Examinations Board (NEB), Sanothimi, Bhaktapur, with the Examination Control Office (Classes 11 and 12) handling the paper. It is taken by students who have completed Grade 11 science study and need a Grade 12 science result for university admission, technical training, or re-sitting a subject. The NEB Class 12 Physics case studies are 5 cases and about 2,888 words.
1Banked Curve Safety in Wet Weather
A highway engineer in a hilly district is checking a curve of radius 48 m banked at 10° for a posted speed of 60 km/h. The road surface is dry in winter but often wet in monsoon.
601 words, about 3 min2Checking an Engine Claim Against the Carnot Limit
A workshop technician tests a small heat engine that is claimed to run between a hot reservoir at 500 K and a cold reservoir at 300 K. In a 10-minute trial the engine takes in 8.0×10^4 J from the hot reservoir, rejects 4.2×10^4 J to the cold reservoir, and delivers 3.8×10^4 J of shaft work.
559 words, about 3 min3Virtual Image from a Projector Lens
A student is asked to project the image of a small illuminated slide onto a screen using a converging lens of focal length 15 cm. The slide is placed 10 cm from the lens on the principal axis.
580 words, about 3 min4Wheatstone Bridge Strain-Gauge Sensitivity
A student builds a Wheatstone bridge to monitor a strain gauge bonded to a metal beam. Three arms are fixed 100 Ω resistors; the fourth arm is the strain gauge, which reads 100.0 Ω when unstrained.
622 words, about 3 min5Photocell Response to Two LEDs
A student tests a photocell with a metal cathode of work function 2.20 eV. Two monochromatic LEDs are available: LED A at 450 nm and LED B at 620 nm.
526 words, about 3 min