![]() Physics Wallah's main focus is to make the learning experience as economical as possible for all students. We believe in empowering every single student who couldn’t dream of a good career in engineering and medical field earlier. PW strives to make the learning experience comprehensive and accessible for students of all sections of society. We successfully provide students with intensive courses by India's top faculties and personal mentors. Physics Wallah also caters to over 3.5 million registered students and over 78 lakh+ Youtube subscribers with 4.8 rating on its app. We also provide extensive NCERT solutions, sample papers, NEET, JEE Mains, BITSAT previous year papers, which makes us a one-stop solution for all resources. Physics Wallah is India's top online ed-tech platform that provides affordable and comprehensive learning experience to students of classes 6 to 12 and those preparing for JEE and NEET exams. If any students need to take the online test to check their concepts or undertstanding then they can visit online test for class 11.ĭownload the Pdf of class 11 physics formula sheet of chapter Unit dimension & vector from the link given below Addition of vectors by analytical methodĭo follow NCERT Solutions for class 11 physics prepared by Physics Wallah.If two vectors are represented in magnitude and direction by the two sides of a triangle taken in order, the third side of the triangle taken in reverse order represents their re- sultant in mangitude and direction. If two vectors are represented in magnitude and direction by the adjacent sides of a par- allelogram drawn from a point, the diagonal passing through that point represents their re- sultant both in magnitude and direction. ![]() Position vector: The vector used to specify the position of a point with respect to some fixed point (say origin ‘O’) is called position vector.Unit vector: A vector whose origin and terminous lie at same point.Null vector: A vector of zero magnitude with indefinite direction.Negative vector: If two vectors A and B are such that they have equal magnitude but opposite directions, each vector is negative of the other.Equal vector: If two or more vectors have equal magnitude and acting in the same direction, they are said to be equal vectors.Parallel vectors: If two or more vectors are parallel to another, they are said to be parallel vectors.The physical quantities having both magni- tude and direction and also obeying laws of vector are knowns as vectors. It gives no information whether a physical quantity is a scalar or vector.Īlways in a physical quantity the numerial value is inversly proportional to its units. We cannot derive the formulae containing trigonometrical functions, exponential functions, log functions etc, which have not dimensions. This is because on equating the powers of M,L and T on either side of the dimensional equation, we can obtain three equation, from which only three unknown dimensions can be calculated. If a quanity depends on more than three factors, having dimensions, the formal cannot be derived. This method gives us no information about the dimensionless constants in the formula, e.g. To derive relationship between the different physical quantities. To change units of a physical quantity from one system into the other. To check the validity of the given equation. of R.H.S terms, that is known as principle of homogeneity. In any dimensional equation if dimensions of L.H.S terms are same to that of dimensions. The dimensions of a physical quantities are the powers up to which the fundamental quantities are to be raised. The expression showing the relation between the derived quantity and fundamental quantities by raising the powers of the fundamental quantities is known as dimensional formula. The m.k.s system is based on metre, kilogram and second as the fundamental units of length, mass and time respectively. The c.g.s system is the Gauusian system which uses centimeter, gram and second as the three basic units for length, mass and time respectively. The f.p.s system is the British Engineering system of units, which uses foot as the unit of length pound+ as the unit of mass and second as the unit time. The physical quantities which can be derived from the fundamental quantities are called as derived quantities. The physical quantity which does not depend upon other physical quantities. List of physics formulas class 11 chapter Unit dimension & vector
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