NCERT 2022 | विद्युत धारा - L8 | Class 12 भौतिक विज्ञान | Hindi Medium | Akash Sir | 10 AM

Class 11 के बाद क्या ? Class 12 Hindi Medium की पढ़ाई साल के शुरू से कैसे करें ?

There are 5 students in class 10, 6 students in class 11 and 8 students in class 12. If the number of ways, in which 10 students can be selected from them so as to include at least 2 students from each class and at most 5 students from the total 11 students of class 10 and 11 is 100 k, then k is equal to _______.

A boat can go 10 km downstream and 8 km upstream in 49 minutes. Also it can go 12 km downstream and 4 km upstream in 42 minutes. What is the speed of stream in km/h? एक नाव 49 मिनट में 10 किमी धारा के अनुकूल और 8 किमी धारा के प्रतिकूल जा सकती है | साथ ही, यह 42 मिनट में 12 किमी धारा के अनुकूल और 4 किमी धारा के प्रतिकूल जा सकती है | धारा की चाल ( किमी/घंटा में ) ज्ञात करें |

If the mean of the following distribution is 27, find the value of p . Class: 0-10 10-20 20-30 30-40 40-50 Frequency: 8 p 12 13 10

In class 12 there are 8 students. In class 11 there are 6 students .In class 10 there are 5 students . Total ways of selecting 10 students , such that there are at least 2 students from each class and at most 5 students from 11 students of Class 10 and 11 combined is 100k. Then find value of k

For and EMWave . E= E_(0) sin 12 xx 10^(6) [X -2 xx 10^(8) t ] (N)/(C ) in a medium then its refractive index is -

The following data : 2, 5, 15, 25, 20, 12, 8, 7, 6, 16, 21,17, 30, 32, 23, 40, 51, 15, 2, 9, 57, 19, 25 is grouped in the classes 0 –5, 5 –10, 10 –15 etc. Find the frequency of the class 20 –25.

Thirty children were asked about the number of hours they watched TV programmes in the previous week. The results were found as follows: 1 6 2 3 5 12 5 8 4 8 10 3 4 12 2 8 15 1 17 6 3 2 8 5 9 6 8 7 14 12 (i) Make a grouped frequency distribution table for this data, taking class width 5 and one of the class intervals as 5 - 10. (ii) How many children watched television for 15 or more hours a week?

Class 12 Physics (Hindi)| Chapter 3 धारा विद्युत् Part 2 | Important Questions | UP Boards