Skip to main content

Posts

RECRUITMENT OF TEACHERS FOR JNV 2011

Navodaya Vidyalaya Samiti (NVS), an autonomous organization under the Ministry of Human Resource Development, Department of School Education & Literacy, Government of India, invites applications in the prescribed format (Annexure-I), from eligible Indian nationals for filling up of vacancies and drawing a panel of candidates for the posts of Trained Graduate Teachers DIRECT RECRUITMENT BASIS in the Jawahar Navodaya Vidyalayas located in various districts of the country . Website : “www.navodaya.nic.in” Last date for submission of applications is within 30 days from the date of publication of this  advertisement (advertisement published in Employment News dated 24-30 September, 2011). TRAINED GRADUATE TEACHERS SUBJECT-WISE POST CODES FOR FILLING UP THE APPLICATION FORM (REF. COL. NO. 01 & 05 OF APPLICATION FORM) TRAINED GRADUATE TEACHERS POST POST CODE HINDI 01 ENGLISH 02 MATHEMATICS 03 SOCIAL STUDIES 04

8th maths Sample paper term -1-2011

8th maths Sample paper term -1-2011

CBSE I NCERT Chapter -Light _Refraction and Refraction solved Questions

VERY SHORT QUESTIONS CARRYING 1 MARK EACH. 1. Out of  convex mirror  and  concave mirror , whose focus is situated behind the mirror? Ans: The focus of convex mirror is situated behind it. 2. For what position of an object, a concave mirror forms an enlarged virtual image? Ans: Object between pole (P) and focus (F) of the concave mirror. 3. If the  focal length  of a concave mirror is 25cm. What is its radius of curvature? Ans: Focal length = Radius of curvature / 2 25 = R / 2  => R = 50cm. 4. A  ray of light  falls on a mirror normally.  What are the  values of angle of incidence and the angle  of reflection? Ans: Both angle of incidence and the angle of reflection are zero. 5. What is the focal length of a plane mirror? Ans: Infinite. 6. Which spherical mirror is called a divergent mirror? Ans: A convex mirror is called a divergent mirror. 7. What is the angle of incidence, when a ray of light falls on the spherical mirror from its centre  of curvat

X CBSE | NCERT E- Notes For Ch - Periodic Classification of Elements of Elements

Classification of elements: the arrangement of elements in such a manner that elements with similar properties are grouped together while elements with dissimilar properties are separated. EARLY ATTEMPTS OF CLASSIFICATION OF ELEMENTS 1. Lavoisier’s classification of elements: In 1789, Lavoisier first attempted to classify the elements into two divisions namely Metals and Non-metals. However this classification was not satisfactory as there were many exceptions in each category. 2. Dobereiner’s classification of elements: In 1817, Johann Wolfgang Dobereiner grouped three elements into what he termed triads . In each case, the middle element has an atomic mass almost equal to the average atomic masses of the other two elements in the triad. For example, elements like lithium, sodium and potassium have atomic masses 7, 23 and 39 respectively. They are grouped together into a triad as, Li (7) Na (23) K (39) Here the atomic mass of sodium is the average o