Use graph paper for this question. A survey regarding height (in cm) of 60 boys belonging to class 10 of a school was conducted. The following data was recorded: Height (in cm) 135 - 140 140 - 145 145 - 150 150 - 155 155 - 160 160 - 165 165-170 No. of boys S 7 1 Taking 2 cm = height of 10 cm on one axis and 2 cm = 10 boys along the other axis. draw an ogive of the above distribution. Use the graph to estimate the following (1) median (1) lower quartile (tr) if above 158 is considered as the tall boy of the class, find the number of boys in the class who are tall. (2018)
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The magnetic effect of electric current is known as electromagnetic effect. It is observed that when a compass is brought near a current carrying conductor the needle of compass gets deflected because of flow of electricity. This shows that electric current produces a magnetic effect.
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