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 You can find middle and senior school Physics information in this blog. The focus is on the CBSE curriculum. However, IB materials may also be available here. This blog is complementary to the Sureshiisj Youtube channel. The pictures of classroom discussions can be found on that channel. However, other materials will be available here. 


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Isometric Scale

 An isometric scale is used for isometric projection. Most of the drawings on a plain sheet of paper are 2-dimensional. We can use three axes at 120o with each other to indicate three dimensions of an object. This generally helps in creating 3-dimensional drawings on a 2D plane.  CBSE Class 12 has isometric scale construction as an essential construction skill.  The steps of construction are as follows; (1) Draw a horizontal line.  (2) Draw an inclined line at 45o with east which is the default 0o.  (3) Using your roller, divide the given true length on the inclined line. If you have to draw an isometric scale of 70 mm, then draw the line of up to 80.  (4) Keep the first 1 cm for dividing into 10 equal parts of  1 mm. Thereafter, divide the length into the required number of equal parts.  (5) Draw another line at 30; with default east.  (6) Draw a vertical line at 30.  (5) Take the height of the line as 4 mm and complete the scale. ...
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Unit Conversion MCQs and VSAs

SECTION – A (PHYSICS) 1. Give one-word answers  (2 x ½ = 1) (i) Convert one quintal into grams    ____________ (ii) Convert 100 centimetres into kilometre    ____________ 2. Fill in the blanks.  (2 x ½ = 1)     (i) Measurement of a physical quantity consists of a ________ and the _______ of the unit. (ii)   Measurement is the comparison of an _________ quantity with _______ quantity. 3. Write true or false.  (4 x ¼   = 1) (i) Submultiples of standard units are used to make large measurements.   _____________ (ii)   In scientific work, accuracy of measurement is not required. _____________ (iii) We can measure similar quantities with different instruments.   _____________ (iv) Accurate measurements are always necessary in our day-to-day life.   _____________ 4. Choose the most appropriate answer.  (4 x ¼   = 1) (i) Which one of these is not a reliable unit of measurement? a. Handspan  ...
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Tips for Isometric projection of machine blocks

Orthographic projection gives us views of objects from a particular direction only. Looking from the front, we get front elevation and from the top, we get a plan or the top view. The orthographic projection is complete in one direction only. To have an entire detail, we need to prepare at least three different views from three different directions. Still, for a quick reference, a pictorial view will be a better option.  We have several ways of drawing pictorial drawings on a two-dimensional plane. It can be a perspective or oblique or isometric pictorial drawing. For Engineering Graphics, we usually use isometric projection to obtain the pictorial impression. In isometric projection, there are three principal axes inclined to each other at an angle of 120 degrees. The corresponding planes are the horizontal plane, the vertical plane, and the profile plane.  For machine blocks, we usually practice with simple cubes, prisms, and pyramids with different orientations. The sol...
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