# LABORATORY APPARATUS (PHYSICS)

Jun 17th, 2015
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1. METER STICK- A measuring stick one meter long that is marked off in centimeters and usually millimeters. It use to measure the length, wideness and thickness of an object. 2. PROTRACTOR- Is a square, circular or semicircular tool, typically in transparent Perspex, for measuring angles.

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KENDRIYA VIDYALAYA SANGATHANDELHI REGIONCLASS XII (PHYSICS)PREPARED BY :K.V. ANDREWS GANJ NEW DELHI2008-2009UNIT 01ELECTROSTATICS1 Marks Questions:Q.1 A certain region has cylindrical symmetry of electric field. Name the charge distributionproducing such a field.Q.2 Represent graphically the variation of electric field with distance, for a uniformlycharged plane sheet.Q.3 How will the radius of a flexible ring change if it is given positive charge?Q.4 Five Charges of equal amount (q) are placed at five corners of a regular hexagon of side10 cm. What will be the value of sixth charge placed at sixth corner of the hexagon so thatthe electric field at the centre of hexagon is zero ?.Q.5 Two conducting spheres of radii r1 & r2 are at same potential. What is the ratio ofcharges on the spheres?.Q.6 Why do we use nitrogen or methane gas in Van-de-Graff generator?Q.7 An electric charge q is placed at one of the corner of a cube of side a. What will be theelectric flux through its one of the face?Q.8A square surface of side L meters is in the plane of the paper. A uniform electricfield E (volts/m), also in the plane of paper, is limited only to lower half of the square asshown in the diagram. What will be the electric flux (in SI units) associated with the surface.EQ.9(A)(B)(C)(D)Which of the following statement is true & why?Ex= Ey =EzEx>Ey>EzEx=Ez

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