This chapter is related to the domain, scope, focus, and properties of the physical world. The students can understand the nuances of Physics very well as some of the anecdotes have already been covered in different topics of Physics and Chemistry in grades 9 and 10. You can find the following Youtube video very useful which I have prepared for the Class of 2024.
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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