Find the answers to the questions given below.
To which device is the electric line reaching our home connected first ?

From given below, which device is used to measure electrical energy.

An incomplete form of the periodic table is given below. Write answers to the questions connecting the position of elements in it. Which is the element that resembles E the most in its properties?

Read the following and answer the questions given below. 1,2,3,4….are natural numbers or counting numbers. The sum of first 4 numbers is 1+2+3+4=(1+4)+(2+3) = 5+5 = 5xx2 =(4+1)+4/2 We can make pairs as given above and can establish a formula to find the sum of first n natural numbers as sum = (1+n)xxn/2 Find the sum of first 10 natural numbers.