For which of these would you use a histogram to show the data : The number of letters for different areas in a postman’s bag. Give reasons for each

For which of these would you use a histogram to show the data : The number of cassettes produced by 5 companies.Give reasons for each

For which of these would you use a histogram to show the data : The height of competitors in an athletics meet.Give reasons for each

For which of these would you use a histogram to show the data : The number of passengers boarding trains from 7:00 a.m. to 7:00 p.m. at a station.Give reasons for each

Which of the following lenses would you prefer to use while reading small letters in a diciionary?

Which of the following lenses would you prefer to use while reading small letters in a dicionary?

Show diagramatically two different arrangements used for winding the primary and secondary coils in a transformer. Assuming the transformer to be an ideal one write expressions fo rthe ratio of its output current to input current in terms of the number of turns in the primary and secondary coils. Mention two reasons for energy losses in an actual transformer.

A survey was conducted by a groupofstudentsas a part of their enviromentawareness programme, in which they collected the following data regarding the number of plants in 20 houses in a locality. Find the mean number of plants per house. Which method did you use for finding the mean, and why?

Long Answer Questions Five mark QUESTIONS FROM CBSE BOARD EXAMINATIONS : (a) Asa senior biology student, you have been asked to demonstrate to the students of secondary level in your school, the procedure(s) that shall ensure cross pollination in a hermaphrodite flower. List the different steps that you would suggest and provide reasons for each one of them.

You are given the following three lenses. Which two lenses will you use as an eye piece and as an objective to construct an astronomical telescope? Give reasons.