Engineering Graphics

CBSE Curriculum of Engineering Graphics is designed to create lifelong learners with sharp thinking skills. Especially the creators of different spheres find the nuances elucidated in this subject very enriching.
CBSE has outlined the following objectives for this course:
Objectives: The study of the subject of Engineering Graphics at the Senior School Level aims at helping the learner to:

develop clear concepts and perceptions of different objects.
develop a clear understanding of plane geometry, solid geometry, and machine drawing so as to apply the same in relevant practical fields such as technology and industry.
develop the skill of expressing two-dimensional and three-dimensional objects in professional language and vice versa.
acquire speed and accuracy in the use of drawing instruments.
acquire the ability to readily draw neat sketches, often needed in "On-job situations".
use technology (CAD) in developing isometric and orthographic projections of simple objects.

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Grade 11 - Engineering Graphics Syllabus

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. ...

Grade 12 Chapter 2 : Electrostatic Potential and Capacitance

Chapter 2: Electrostatic Potential and Capacitance. Starting from the concept of electrical work, we establish the concept of electrostatic potential energy. This energy per unit charge is defined as the electric potential. We obtain an expression for the potential of a source charge by bringing a unit test charge from infinity to a location in the space. Similarly, using the geometry, we can find the potential due to the dipole. Moreover, we can relate the electric field and the potential also. Usually, the electric field is taken as the negative of the potential gradient. To create a system of charges, we have to spend some energy and this will be stored as the potential energy of the system. The same logic can be extended for rotating a dipole in an external field. Here also, by doing work against the net torque of the uniform external field, we can store the energy in the dipole. A very interesting point of discussion in Chapter 2 is related to the elec...

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