CBSE Class 10 Answered
Vector has a length from source point to a destination point and also direction from source to destination.
For example, vector OA, starts from point O and ends on A.
But the length of the vector is not the only way to reach from point O to A.
If we use cartesian coordinate system, then we can start from O and move some distance in x direction, then some in y and similarly in z. And still we'll reach to point A.
Those some distances along x, y and z directions are called the components of the vector in the x, y and z direction respectively.
For example OA = ai + bj + ck, where a, b and c are the components ("those some distances along x, y and z directions respectively") of the vector OA. And i, j and k are unit vectors.
When we have to add two vectors we add their corresponding components.
This video describe Functions of main parts of human eye.
This video shows the calculation of electricity consumed, electric current ...
This video shows explains the application of formula for calculating the po...
This video describes the calculation of cost of electricity for electrical ...
This video describes the calculation of effective resistance, total current...
Causes of Refraction of LightExplain refraction of light and define rarer/denser medium, refracted ray,...
Refractive IndexExplain the rules for the ray diagram for spherical lenses. Draw ray diagr...
Refraction and Spherical Lenses - Part 1Define convex and concave lenses, optical centre, principle axis, centre o...
Lens Formula, Magnification and Power of a LensDefine New Cartesian Sign convention, object/image distance, lens formula,...
Structure of Human EyeFunction of cornea, pupil, iris, eye lens, ciliary muscles, rods & cones. ...