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5(B) || Modulus, Argument, Polar Form || Exercise 5.2 || Complex Numbers || Class 11 Maths

In this lecture, I am discussing graphical representation of complex numbers on Cartesian Coordinate System and Polar Coordinate System.

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https://youtube.com/ashishkumarletslearn

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https://www.youtube.com/watch?v=K74Zn85UOzI&list=PLvO7gOpVcZGGgovbOTGfnirGQoyBZad42&index=2&t=0s

AshishKumarLetsLearn provides Online Video Tutorials, PDF Notes & Assignments prepared by expert teachers for Chapter 2 Inverse Trigonometric Functions for Class 12 Maths.

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🔴Online Lecture - 4(K) | Class 12 | Mathematics | Chapter 4 | DETERMINANTS

In this lecture, I am discussing practice questions from miscellaneous exercise of chapter 4 class 12.

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🔴Online Lecture 8(B) | BINOMIAL THEOREM | Class 11

In this lecture, I am discussing practice questions from NCERT Exercise 8.1 of Class 11.

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1(K) | Exercise 2.7 to 2.15 | Units and Measurements | Physics | Class 11

Question 2.7 A student measures the thickness of a human hair by looking at it through a microscope of magnification 100. He makes 20 observations and finds that the average width of the hair in the field of view of the microscope is 3.5 mm. What is the estimate on the thickness of hair ? Question 2.8 Answer the following : (a)You are given a thread and a metre scale. How will you estimate the diameter of the thread ? (b)A screw gauge has a pitch of 1.0 mm and 200 divisions on the circular scale. Do you think it is possible to increase the accuracy of the screw gauge arbitrarily by increasing the number of divisions on the circular scale ? (c) The mean diameter of a thin brass rod is to be measured by vernier callipers. Why is a set of 100 measurements of the diameter expected to yield a more reliable estimate than a set of 5 measurements only ? Question 2.9 The photograph of a house occupies an area of 1.75 cm2 on a 35 mm slide. The slide is projected on to a screen, and the area of the house on the screen is 1.55 m2. What is the linear magnification of the projector-screen arrangement. Question 2.11 The length, breadth and thickness of a rectangular sheet of metal are 4.234 m, 1.005 m, and 2.01 cm respectively. Give the area and volume of the sheet to correct significant figures. Question 2.12 The mass of a box measured by a grocer’s balance is 2.300 kg. Two gold pieces of masses 20.15 g and 20.17 g are added to the box. What is (a) the total mass of the box, (b) the difference in the masses of the pieces to correct significant figures ? Question 2.13 A physical quantity P is related to four observables a, b, c and d as follows :The percentage errors of measurement in a, b, c and d are 1%, 3%, 4% and 2%, respectively. What is the percentage error in the quantity P ? If the value of P calculated using the above relation turns out to be 3.763, to what value should you round off the result ? Question 2.14 A book with many printing errors contains four different formulas for the displacement y of a particle undergoing a certain periodic motion : (a) y = a sin 2π t/T (b) y = a sin vt (c) y = (a/T) sin t/a (d) y a = ( 2 ) (sin 2 / + cos 2 / ) πt T π t T (a = maximum displacement of the particle, v = speed of the particle. T = time-period of motion). Rule out the wrong formulas on dimensional grounds. Question 2.15 A famous relation in physics relates ‘moving mass’ m to the ‘rest mass’ mo of a particle in terms of its speed v and the speed of light, c. (This relation first arose as a consequence of special relativity due to Albert Einstein). A boy recalls the relation almost correctly but forgets where to put the constant c. He writes :

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Explore NCERT solutions for Class 10 Maths provided by India's First FREE Online Tuition Platform with expert created video lectures and notes.

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Website - www.ashishkumarletslearn.com #education #educationindia #iitjee #jeemains #iit #pdfnotes #Matrices #MatricesClass12 #homeschooling #maths #mathematics #knowledgeispower #selfeducation #ashishkumarletslearn #homeschool #india #upboard #stateboard #biharboard #cbseboard #cbse #educationfirst #iitjeemains https://www.instagram.com/p/BwcLnH2gGjR/?utm_source=ig_tumblr_share&igshid=4i9lh42fakz1

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Full syllabus of Class 12 Maths divided into 22 self study courses which include explanation of all the 13 chapters, NCERT Exercise solutions, NCERT Examples, NCERT Exemplar Problem, Board's Question Bank that are arranged within assignments created by Ashish Kumar (Agam Sir), which also include Notes in PDF form.

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AshishKumarLetsLearn provides Online Video Tutorials, PDF Notes & Assignments prepared by expert teachers for Sets Class 11 Maths. All notes, assignments, practice questions and sample papers are provided by the expert teachers. Students do not even need to purchase a textbook for their preparation.

This online learning platform provides chapter wise courses that will cover NCERT Exercise, Examples, NCERT Exemplar, R.D Sharma and Board’s Question Bank.

www.ashishkumarletslearn.com