Questions

Two particles with charges q1 and q2 are kept at a certain distance to exert force F on each other. If the distance is reduced to one-fifth, then the force between them is

What is the principal focus of a spherical mirror?

Who among the following is credited with starting the work on plant tissue culture?

Vistara airline is a joint venture between Tata Sons and which international airlines?

Notepad' is a text editor in which of the following operating systems?

In the following passage, some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of the four alternatives.

Starting late-2014, scientists of the National Aeronautics and Space Administration (NASA) working _______ satellite data tracking the rift found that the defect in the Larsen C was growing _________. By 2016 the crack became 70 miles long and 300 feet ________. By January 2017 it measured 109 miles in length and 1,500metres in breadth. On July 12, it broke. The broken shelf, now __________ official iceberg, was massive, indeed the ____________-ever such iceberg, weighing 1.1trillion tons and measuring 2,200 square miles.

and 300 feet ________. By January 2017

In the following question, a word has been written in four different ways out of which only one is correctly spelt. Select the correctly spelt word.

If 1 x 3 x 5 = 1925 and 7 x 9 x 11 = 4981121 , then find the value of 19 x 21 x 23 = ?