h apter Contents Unit & Dimension, Basic Maths and Vector 01. THEORY 1 02. EXERCISE (S-1) 18 03. EXERCISE (S-2) 21 04. EXERCISE (O-1) 22 05. EXERCISE (O-2) 30 06. EXERCISE (JM) 38 07. EXERCISE (JA) 39 08. ANSWER KEY 41
node06\B0BA-BB\Kota\JEE(Advanced)\NURTURE\N-Advanced & Star\Phy\Sheet\Unit & Dimension, Basic Maths and Vector\Eng.p65 ALLEN Unit & Dimension, Basic Maths and Vector 1 E F>OI?97BGK7DJ?J?;I7D:KD?JI F^tn_YWblpWio_o_[n0 All quantities that can be measured are called physical quantities. eg. time, length, mass, force, work done, etc. In physics we study about physical quantities and their inter relationship. C[Wnpm[h[io0 Measurement is the comparison of a quantity with a standard of the same physical quantity. 9bWnn_\_YWo_ji0 Physical quantities can be classified on the following bases : ?$ 8Wn[Zjio^[_mZ_m[Yo_jiWbkmjk[mo_[n '$ IYWbWmn0The physical quantities which have only magnitude but no direction are called scalar quantities. ;s$ mass, density, volume, time, etc. ($ L[Yojmn0The physical quantities which have both magnitude and direction and obey laws of vector algebra are called vector quantities. ;s$ displacement, force, velocity, etc. ??$ 8Wn[Zjio^[_mZ[k[iZ[iYt '$
node06\B0BA-BB\Kota\JEE(Advanced)\NURTURE\N-Advanced & Star\Phy\Sheet\Unit & Dimension, Basic Maths and Vector\Eng.p65 2 JEE-Physics ALLEN E ($ 9=Ijm=Wpnn_Wintno[h0 In this system the fundamental quantities are length, mass and time and their respective units are centimetre (cm), gram (g) and second (s). )$ CAIntno[h0 In this system also the fundamental quantities are length, mass and time but their fundamental units are metre (m), kilogram (kg) and second (s) respectively. *$ ?io[miWo_jiWbntno[hI?j\pi_on0 This system is modification over the MKS system and so it is also known as Rationalised MKS system. Besides the three base units of MKS system four fundamental and two supplementary units are also included in this system. 9bWnn_\_YWo_jij\Ki_on0 The units of physical quantities can be classified as follows : '$
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