NSEJS case studies
NSEJS · Put your knowledge to work in context.
NSEJS, the National Standard Examination in Junior Science, is a multiple-choice screening examination conducted by the Indian Association of Physics Teachers (IAPT). It is the junior-tier entry point in IAPT's National Standard Examination family, which the association describes as the first step towards the international science olympiads. The NSEJS case studies are 5 cases and about 3,811 words.
1The Shopkeeper's Unequal-Arm Balance
During the annual science-club audit of the local market, Class 9 students bring a shopkeeper's beam balance to the school laboratory. They have no certified 1 kg standard, but the shopkeeper's brass weights were checked against the school's standard set the previous month.
768 words, about 4 min2The Extension Board That Keeps Blowing Fuses
Rohit's study table has a single 5 A wall socket supplying 220 V. His extension board has a flex rated for 6 A and a 5 A fuse in the live wire.
775 words, about 4 min3What Is Really in the Baking Soda Jar?
A jar labelled 'baking soda' has stood open on a damp laboratory shelf for months, and the teacher suspects that part of it has changed to washing soda. A student weighs exactly 5.00 g of the dry powder into a pre-weighed crucible, heats it strongly, cools it in a desiccator and reweighs: the residue is 3.88 g.
755 words, about 4 min4Two Water Samples, One Dropper of Soap
A village school has two water sources: a borewell (sample P) and a rooftop rain-harvesting tank (sample Q). Students take 20 mL of each, add soap solution drop by drop, shake exactly ten times after each drop and record the number of drops needed for a lather that persists for 30 seconds.
737 words, about 4 min5Reading a Potometer: Wind, Vaseline and a Backward Bubble
A student sets up a simple potometer. A freshly cut leafy twig with six similar leaves is fixed through a bored cork into a water-filled glass tube connected to a capillary carrying an air bubble.
776 words, about 4 min