Now, in the above equation, we can see all the elements are zero in the second row of the matrix on the LHS. Therefore, A-1 does not exist. Note: Suppose A = IA, after applying the elementary transformation, if any row or column of a matrix on LHS is zero, then A-1 does not exist. […]

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## CBSE 10th Compartment Form 2021 Application Form Improvement Form

Central Board of Secondary Education releases the CBSE 10th Compartment Form 2021 Application Form Improvement Form on its official website every year in the month of July after the declaration of the final exam results. Recently CBSE have released the final result of both the class 10th and 12th. It is expected that soon CBSE […]

## NCERT 12 Maths Matrices Chapter 3 – Exercise 3.3

Directions (Q. No. 11 and 12) Choose the correct answer in the following questions: 11. If A, B are symmetric matrices of same order, then AB-BA is a (i) Skew-symmetric matrix (ii) Symmetric matrix (iii) Zero matrix (iv) Identity matrix Sol. Given, a and B are symmetric matrices → A’ = A and B’ = […]

## NCERT 12 Maths Matrices Chapter 3 – Exercise 3.2

Note: If two matrices have different orders then we can neither add nor subtract the matrices but we can multiply the matrices either the orders are same or number of columns of first matrix is equal to the number of rows of second matrix. By definition of equality of matrix as the given matrices are […]

## CBSE Class 10 Maths Sample Papers 2021 Pdf Important Question Paper

CBSE Class 10 Maths Sample Papers 2021 Pdf Important Question Paper: CBSE Class 10th Mathematics Latest Practice Papers, sample paper class 10 maths 2020-21, CBSE Class 10th Sample Papers for all subjects. Maths is one of the important subjects and it has formulas and no one wants to take risk so most of the students […]

## NCERT 12 Maths Matrices Chapter 3 – Exercise 3.1

Sol. (i) In the given matrix, the number of rows is 3 and the number of columns is 4. Therefore, the order of the matrix is 3 × 4. (ii) Since, the order of the matrix is 3 × 4, so there are 3 × 4 = 12 elements in it. 2. If the matrix […]

## NCERT Solutions for Class 12 – All Subjects

NCERT Solutions for Class 12 – All Subjects, and if you want to include all subject in terms of Science, Arts/humanities or Commerce. Then for NCERT Solutions for All subjects like, NCERT Solutions for Class 12 Chemistry, NCERT Solutions for Class 12 Biology, NCERT Solutions for Class 12 Chemistry, NCERT Solutions for class 12 Maths. All […]

## NCERT 12 Maths Inverse Trigonometric Function Chapter 2 – Exercise 2.2

## CBSE Class 10th Maths Syllabus 2021 Important Topics Included

CBSE Class 10th Maths Syllabus 2021 Important Topics Included: CBSE class 10th maths syllabus 2020-21, CBSE class 10th maths syllabus 2021 with latest blueprints, CBSE class 10th maths syllabus download pdf online, click here to download CBSE class 10th maths syllabus 2020-21, CBSE class 10th maths syllabus with latest marking scheme. CBSE class 10th board […]

## NCERT Solutions for Class 12 Physics – All Chapter

NCERT Solutions for Class 12 Physics – All Chapter & Important Questions. As you know NCERT released new syllabus and exam pattern, so according to the new exam syllabus/ exam pattern, you will get each and every chapter with new exam pattern. NCERT Solutions for Class 12 Physics – All Chapter Electrostatic charges and fieldsElectrostatic […]

## NCERT 12 Physics Communication Chapter 15 Exercise

Q.1. Which of the following frequency/frequencies will be suitable for beyond the horizon communication using sky waves ? (a) 10 kHz (b) 10 MHz (c) 1 GHz (d) 1000 GHz Sol. Choice (b) is correct. This is because 10 kHz cannot be radiated due to large antenna size. 1 GHz and 1000 GHz will penetrate. […]

## NCERT 12 Physics Semiconductor Electronics Materials, Devices And Simple Circuits Chapter 14 Exercise

Q.1. In n- type which of the following statement is true: (a) Electrons are majority carriers and trivalent atoms are the dopants (b) Electrons are minority carriers and pentavalent atoms are the dopants (c) Holes are minority carriers and pentavalent atoms are the dopants (d) Holes are majority carries and trivalent atoms are the dopants […]

## NCERT 12 Physics Nuclei Chapter 13 Exercise

Q.1.(a) Two stable isotopes of 3Li6 and 3Li7 have respective abundances of 7.5 and 92.5 . These isotopes have masses 6.01512 u and 7.01600 u respectively. Find the atomic weight of lithium.(b) Boron has two stable isotopes 5B10. Their respective masses are 10.01294 u and 11.00931 u, and the atomic weight of boron is 10.811 […]

## NCERT 12 Physics Atoms Chapter 12 Exercise

Q.1. Choose the current alternative from the clues given at the end of each statement : (a) The size of the atom in Thomson’s model is ……. The atomic size in Rutherford’s modal (much greater than/no different from/much less than) (b) IN the ground state of………., electrons are in stable equilibrium, while in …….. electrons […]

## CBSE Class 10 hindi blueprint 2021 Hindi Marking scheme Chapter Wise

CBSE Class 10 hindi blueprint 2021 Hindi Marking scheme Chapter Wise: CBSE class 10th latest hindi blueprints, CBSE class 10th latest hindi marking scheme, CBSE class 10th chapter wise blueprints 2021, CBSE class 10th Hindi course-A blueprints 2021, download latest CBSE class 10th hindi syllabus with blueprints,CBSE class 10th Hindi course-B blueprints 2021, click here to […]

## CBSE 10 Computer Marking Scheme 2021 Blueprint Board Exam Important Chapter

Central Board of Secondary Education has recently released CBSE 10 Computer Marking Scheme 2021 Blueprint Board Exam Important Chapter on its official website. Students must be familiar with the changes that the board as introduced in class 10th and 12th syllabus for the academic year 2020-21. Here we have discussed the CBSE Class 10th Computer Application […]

## CBSE Class 10th Compartment Result 2020 All Subject Result

CBSE Class 10th Compartment Result 2020: Central Board of Secondary Education have announced the Class 10th 2020 Result on its official website cbse.nic.in. After this announcement CBSE releases the class 10th compartment exam date sheet 2020 for those students who failed in their final examination or wish to improve their scores in particular subjects. All […]

## CBSE Class 10th Hindi Syllabus 2021 Important Questions For Board Exam

DownloadCBSE Class 10th Hindi Syllabus 2021 from here. Students can check out the details like Class 10th Hindi Important Questions, Class 10 Hindi course A Syllabus 2021, Class 10 Hindi Course B Syllabus 2021 and easily download cbse class 10 hindi syllabus 2020-21 pdf from this article. Central Board of Secondary Education have recently announced […]

## CBSE Class 10 Computer Sample Paper 2021 pdf Download

CBSE students can now download the latest CBSE Class 10 Computer Sample Paper 2021 pdf Download. Here we are informing the students that Central Board of Secondary Education have recently released the new syllabus for all the subjects. All the sample papers provided here are based on the CBSE latest 10th syllabus. These sample papers […]

## CBSE Marking Scheme for Class 10 2021 Blueprint Maths, Science, Social Science

CBSE Marking Scheme for Class 10 2021 Blueprint Maths, Science, Social Science: cbse marking scheme 2021, CBSE Class 10th All subjects blue prints, CBSE Class 10th Latest blueprints of Mathematics, CBSE Class 10th Revised Blueprints of Science, CBSE New Blueprints 2021 for Social Science, CBSE Class 10th Subject wise Marking Scheme, CBSE Class 10th Chapter Wise […]

## NCERT 12 Physics Dual Nature Of Radiation And Matter Chapter 11 Exercise

Q.1. find the (a) maximum frequency and (b) minimum wave-length of X- rays produced by 30 KV electrons. Given, h = 6.6310-34 Js. Q.2. the work function of caesium metal is 2.14 eV. When light of frequency 6⨯1014 Hz is incident on the metal surface, photoemission of electrons occurs. What is the (a) maximum kinetic […]

## NCERT 12 Maths Solutions of Inverse Trigonometric Functions – Chapter 2 (Ex.2.1)

NCERT 12 Maths Inverse Trigonometric Functions – Chapter 2 (Ex.2.1), NCERT Class 12 maths chapter 2 solutions. Direction (Q. No. 1 to 10) Find the principal values of the following questions. Direction (Q. Nos. 11 to 14) Find the values of the following questions: Direction (Q. Nos. 11 to 14) Find the values of the […]

## NCERT 12 Physics Wave Optics Chapter 10 Exercise

Q.1. Monochromatic light of wavelength 589 nm incident from air on a water surface. What are the wavelength frequency and speed of (a) reflected and (b) refracted light? of water is 1.33. Q.2. What is the shape of the wavefront in each of the following cases ? (a) light diverging from point source. (b) light […]

## CBSE Class 10th English Marking Scheme 2021 Blueprint/Weightage

Check here the latest CBSE Class 10th English Marking Scheme 2021. CBSE high school students can view all the information on marking scheme of English class 10th cbse 2020-21 in this post. Central Board of Secondary Education has recently released the latest CBSE Class 10th English Syllabus 2020-21 of all subject along with the cbse […]

## NCERT 12 Physics Ray Optics And Optical Instruments Chapter 9 Exercise

Q.1. A small candle 2.5 cm in size is placed 27 cm in front of a concave mirror of radius of curvature 36 cm. At what distance form the mirror should a screen be placed in order of receive a sharp image ? Describe the nature and size of the image. If the candle is […]

## CBSE 10 Science Syllabus 2021 Board Exam Download Full PDF

CBSE 10 Science Syllabus 2021 : Central Board of Secondary Education have implemented new changes in latest class 10th syllabus of all subjects. The authority have taken a step to shorten the syllabus for classes 10th, 11th and 12th due to the Covid-19 situation and nationwide lockdown. Here we are providing students necessary details of ncert […]

## CBSE Class 10th Maths Syllabus 2021 Important Topics Included

CBSE Class 10th Mathematics Syllabus for the session 2020-21 including important topics is available here. Students can check out all the details regarding latest Class 10th Maths Syllabus with all the changes that Central Board of Secondary Education have implemented this year. If you are looking forward to score good marks in the upcoming board […]

## CBSE Class 10 Examination Form 2021 Board Exam Fill Online

CBSE Class 10 Examination Form 2021: Every year large number of students appear for CBSE Class 10th Board Examination. Central Board of Secondary Education releases an online exam application form for the students who are going to sit for board exams for the session 2020-21. CBSE Class 10th Examination Form 2021 is released on the […]

## NCERT 12 Physics Electromagnetic Waves Chapter 8 Exercise

Q.1. shows a capacitor made of two circular plates each of radius 12 cm and separated by 5.0 mm. The capacitor is being charged by an external source (not shown in the figure). The charging current is constant and equal to 0.15 A. (a) Calculate the capacitance and the rate of change of potential difference […]

## NCERT 12 Physics Alternating Currents Chapter 7 Exercise

Q.1. A 100 Ω resistor is connected to a 220 V, 50 Hz ac supply.220 (a) What is the rms value of current in the circuit ? (b) What is the net power consumed over a full cycle ? Q.2. (a) The H inductor is connected to 220 V, 50 Hz a. c. supply. Determine […]