Mann Marathi Tv

Standard XI Physics Chapter 2 - Mathematical Methods Exercise Mathematical Methods 1. Choose the correct option.  i) The resultant of two forces 10N and 15N acting along the + x and -x axis respectively,  is  A) 25 N along + x-axis B) 25  N along - x-axis C) 5 N along + x-axis D) 5 N along - x-axis Answer : D) 5 N along - x-axis ii) For two vectors to be equal,  they should have the  A) same magnitude B) same direction  C) same magnitude and direction D) same magnitude but opposite direction Answer : C) same magnitude and direction iii) The magnitude of scalar product of two unit vectors perpendicular to each other is  A) zero B) 1 C) -1  D) 2  Answer : A) zero iv) The magnitude of vector product of two unit vectors making an angle 60 degree with each other is  A) 1 B) 2 C) 3/2 D) root3/2 Answer : D) root3/2 v) If A, B and C are three vectors, then which of the following is not correct ?  A) A. (B + C ) = A. B + A. C B) A. B = ...

Standard XI - Physics : Chapter 1 : Units and Measurements : Exercise Solutions : Complete Questions and Answers with Explaination ch-1 Units and Measurements : Excercise Solutions EXERCISE-  1. Choose the correct option. i) [L¹M¹T-²] is the dimensional formula for  A) Velocity B) Acceleration C) Force D) Work Answer : C) Force ii) The error in the measurement of the sides of a rectangle is 1%. The error in the measurement of it area is A) 1% B) 1/2% C) 2% D) None of the Above  Answer: C) 2% iii) Light year is a unit of  A) Time  B) Mass C) Distance  D) Luminosity Answer : C) Distance  iv) Dimensions of kinetic energy are same as that of  A) Force B) Acceleration C) Work D) Pressure Answer : C) Work v ) Which of the following is not a fundamental unit? A) cm B) kg C) centigrade D) volt Answer : D) volt 2) Answer the following questions Q2-ii ) What are the dimensions of the quantity l root l/g,  l   being the length and g the accele...