ARMY PUBLIC SCHOOL, YOL CANTT (H.P) (CBSE AFFILIATION NO : 630040) h No. 01892-235269, Email:  apsyolcanttigmail.com Website:  www.apsyol.org LSB INTERVIEW : 0CT 2023 Last date :     12 October 2023 APS Yoi Cantt. is conducting Local Selection Board (LSB) for the post of Accountant (Ex-Servicemen only) on regular basis/pane as per AWES Rules. Desirous candidates may apply on prescribed application form available in the school offica costing Rs. 20/- from 13 Sep 2023, Same may also be downloaded from school website.  Application fom duly completed in all respect along with the requisite fee of Rs. 100/- in the form of bank draft in favour of Army Public School, Yol Cantt., payable at Yol Cantt.  Application fom should be submitted till 12 Oct 2023 with testimonlals strictly as perinstructions givenin theapplication form. Note: No TADA admissible.  Candidates must be good in computer. Only short list...

CORROSION  When a metal is attacked by substances around it such as moisture, acids, etc., it is said to corrode and this  process is called corrosion.  The black coating on silver and the green coating on copper are other examples of corrosion.  Corrosion causes damage to car bodies, bridges, iron railings, ships and to all objects made of metals,  specially those of iron Rancidity  When fats and oils are oxidised, they become rancid and their smell and taste change.  Usually substances which prevent oxidation (antioxidants) are added to foods containing fats and oil.   Keeping food in air tight containers helps to slow down oxidation.  chips manufacturers usually flush bags of chips with gas such as nitrogen to prevent the chips from getting  oxidised Importance of pH in Everyday Life  Our body works within the pH range of 7.0 to 7.8. Living organisms can survive only in a narrow range of  pH change.  When pH of rain water is less than 5.6, it is call...

 Light travels along straight lines.  Any polished or a shining surface acts as a mirror.  An image which can be obtained on a screen is called a real image.  An image which cannot be obtained on a screen is called a virtual image.  The image formed by a plane mirror is erect. It is virtual and is of the same size as the object. The image is at the same distance behind the mirror as the object is in front of it.  In an image formed by a mirror, the left side of the object is seen on the right side in the image, and right side of the object appears to be on the left side in the image.  A concave mirror can form a real and inverted image. When the object is placed very close to the mirror, the image formed is virtual, erect and magnified.  Image formed by a convex mirror is erect, virtual and smaller in size than the object.  A convex lens can form real and inverted image. When the object is placed very close to the lens, the image formed is virtual, erect and magnified. When us...

 Magnetic Effects of Electric Current  A compass needle is a small magnet. Its one end, which points towards north, is called a north pole, and  the other end, which points towards south, is called a south pole.  An electromagnet consists of a core of soft iron wrapped around with a coil of insulated copper wire  A generator converts mechanical energy into electrical energy. It works on the basis of electromagnetic  induction  In our houses we receive AC electric power of 220 V with a frequency of 50 Hz.  One of the wires in this supply is with red insulation, called live wire.  The other one is of black insulation, which is a neutral wire. The potential difference between the two is  220 V.  The third is the earth wire that has green insulation and this is connected to a metallic body deep inside  earth. It is used as a safety measure to ensure that any leakage of current to a metallic body does not give  any severe shock to a user. FUSE  A fuse in...

Practical Applications of Heating Effect of Electric Current  The generation of heat in a conductor is an inevitable consequence of electric current.  However, heating effect of electric current has many useful applications.  The electric laundry iron, electric toaster, electric oven, electric kettle and electric heater are some of the  familiar devices based on Joule’s heating.  The electric heating is also used to produce light, as in an electric bulb.  Here, the filament must retain as much of the heat generated as is possible, so that it gets very hot and  emits light. It must not melt at such high temperature.  A strong metal with high melting point such as tungsten is used for making bulb filaments.  The filament should be thermally isolated as much as possible, using insulating support, etc.  The bulbs are usually filled with chemically inactive nitrogen and argon gases to prolong the life of  filament.  Most of the power consumed by the filament appears a...