12th Physics | साइक्लोट्रॉन - सिद्धांत, रचना, क्रियाविधि Ch 4 L6 | गतिमान आवेश और चुंबकत्व Gopal Sir

Class 12 Physics (Hindi) | Chapter 4 गतिमान आवेश एवं चुम्बकत्व | Important Questions and Quick Revision

The average of twelve numbers is 55.5. The average of the first four numbers is 53.4 and that of the next four numbers is 54.6. The 10th number is greater than the 9th number by 3 but lesser than the 11th and 12th numbers by 2 and 3, respectively. What is the average of the 10th and the 12th numbers? बारह संख्याओं का औसत 55.5 है | पहली चार संख्याओं का औसत 53.4 है तथा अगली चार संख्याओं का औसत 54.6 है | 10वीं संख्या 9वीं संख्या से 3 अधिक है लेकिन 11वीं और 12वीं संख्याओं से क्रमशः 2 और 3 कम है | 10वीं और 12वीं संख्याओं का औसत ज्ञात करें |

x is the 4th proportional to 12, 16 and 5, and 20, y, 15, 21 are in proportion. Then the value of (6x-y) is: x, 12, 16 और 15 का चौथा समानुपाती है , तथा 20, y, 15, 21 समानुपात में हैं |(6x-y) का मान है :

This question is based on the following alphabet series. A B C D E F G H I J K L M N O P Q R S T U V W X Y Z If the first 6 letters are written in reversed order, then the next 5 letters are written in reversed order and again next 6 letters are written in reversed order then which letter is in the middle between 7th letter from the left and 12th letter from the right? 1) G 2) T 3) H 4) U 5) None of these

Given question are based on the given English, alphabet series. A B C D E F G H I J K L M N O P Q R S T U V W X Y Z How many letters are in the middle between 6th and 19th letters from the left? 1) 11 2) 13 3) 10 4) 12 5) None of these

A chocolate has 12 equal pieces. Manju gave l/4th of it to Anju, l/3rd of it to Sujata and l/6th of it to Fiza. The number of pieces of chocolate left with Manju is

In chemistry, 'mole' is an essential tool for the chemical calculations. It is a basic SI unit adopted by the 14^(th) general conference on weights and measurements in 1971. A mole contains as many elementary particles as the number of atoms present in 12 g of ""^(12)C . 1 mole of a gas at STP occupies 22.4 litre volume. Molar volume of solids and liquids is not definite. Molar mass of a substance is also called gram-atomic mass or gram molecular mass. The virtual meaning of mole is plenty, heap or the collection of large numbers. 1 mole of a substance contains 6.022 xx 10^(23) elementary particles like atom or molecule. Atomic mass unit (amu) is the unit of atomic mass, e.g., atomic mass of single carbon is 12 amu. XL N_(2) , gas at STP contains 3xx10^(22) molecules. The number of molecules in x L ozone at STP will be