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Question paper 2018 class9 by SDV samastipur ⥈⤘Pls share/mail this paper to CBSE so that paper in nest exam prepared by Board according to cbse syllabus ✍✋ Question: What is Zeeman effect Ans: The Zeeman effect is the splitting of the spectral lines of an atom in the presence of a strong magnetic field. The effect is due to the distortion of the electron orbitals because of the magnetic field. Question: What is Stark Effect in Atomic Spectra. Ans: The splitting of atomic spectral lines as a result of an externally applied electric field is called the Stark effect Question: why was gas at low pressure is taken during discharge tube experiment for discovery of electron? Ans: Gas at low pressure is taken during discharge tube experiment so that the electrons in the beam cannot be deflected if they hit molecules of gas. Question:if Rutherford mode is correct than why atom should collapse? Ans: if we apply magnetic theory to Rutherford model of atom then electron will loose ener...

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CBSE Class 10 Board Exam 2018 ​ CBSE Sample Papers for Class 10th board exam 2018 are available here. These Sample Papers are based on sample paper recently issued by CBSE for Class 10 board exams which are scheduled to be held on Feb/March 2018. You can download these Sample Papers in PDF format 10th Maths Sample paper CBSE Board Exam 2018 10th maths solved sample paper 2017-18-1         Download File 10th maths solved sample paper 2017-18-2        Download File 10th maths solved sample paper 2017-18-3        Download File 10th maths solved sample paper 2017-18-4       Download File 10th Science Sample paper CBSE Board Exam 2018 10th Science solved sample paper 2017-18-1     ​ Download File ​ 10th Science solved sample paper 2017-18-2      Download File 10th English Sample paper CBSE Board Exam 2018 10th English solved sample paper 2017-18-1 ...